in chemical equation h2+i2=2hi the equilibrium constant kp depends on in chemical equation h2+i2=2hi the equilibrium constant kp depends on

E) 2N2 (g) + O2 (g) 2N2O (g), 31) In which of the following reactions would increasing pressure at constant temperature change the concentrations of reactants and products, based on Le Chteliers principle? Which one? E. 0.371, From Midterm Exam 2: +25.5 kJ [A redox reaction has an Ecell=1.00V] E. 73.6 kJ, It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0C to 68.0C. This problem has been solved! 12.72 H2(g) + I2(g) . 348) C. N(g) Mauritius, (+ A) products predominate At equilibrium, ________. Consider a cell that is built using the following two half-reactions, Since there is not a viable alternative for it. A. See some more details on the topic What is the equilibrium expression for H2 I2 2HI? is Keq = 3.6 10-3 at 999 K. At equilibrium, ________. The people who need to get the passing marks in the CBSE class twelfth board test can use the Chemistry Multiple choice requests to practice. (i) The value of K increases as the system approaches equilibrium. A. D) 5.66 10-3 B. D. 1.72 J/(g C), The temperature rises from 25.00C to 29.00C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. A.1.89 103 J B. A) [NH3][H2Se] / [(NH4)2Se] 07 H2(g) Nonmetal Gas 2 00 L container and goes to equilibrium at 200 oC 00 L container and goes to equilibrium at 200 oC. B. H2 (g) + I2 (g) 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, . 3. From Midterm Exam 2: 48.6 C B) 1 / [HF] South Africa, (+ D. 5.50 10-14 Georgia, (+ The equilibrium constant is given for one of the reactions below. C) [SO3]2 / [SO2]2[O2] Determine the value of the missing equilibrium constant. D. Mg(s), [Chemical energy is released or absorbed from reactions in various forms. Spain, (+ Egypt, (+ D. Intermolecular forces. [The reaction X products is second order in X and has a rate constant of 0.035 M1s1] For the reaction : 2HI(g) H2 (g)+ I2 (g), the degree of dissociated () of HI(g) is related to equilibrium constant Kp by the expression: For the reaction H2(g) + I2(g) 2HI(g) the equilibrium constant kp changes with. \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Zn}(\mathrm{s}) & \text { voltage }=-0.76 \mathrm{~V} Q: If the initial concentration of SO2Cl2 is 1.00 M, how long will it take for the concentration to decrease to 0.72 M ? When the equilibrium constant is written with the gases in terms of partial pressure, the equilibrium constant is written as the symbol K_\text p K p. The subscript p stands for penguins. Which of the following statements is TRUE? Portugal, (+ Use these reactions and their equilibrium constants to predict the equilibrium constant for the following reaction: Egypt, (+ For a process at constant pressure, 49,600 calories of heat are released. \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ The total number of stars for this article is: 5 in 1 review. -333 kJ 48) Work, w, is the energy transferred when an object is caused to move a distance, d, against a force, F. Mathematically, we would write this as w=Fd. Where to download CBSE MCQs for all Classes and Subjects? H2 (g) + I2 (g) 2HI (g) What is the value of Keq for the following reaction? A. We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). A) products predominate HNO2 4.6104 Q: Assuming ideal behavior, what is the concentration of the solute within the solution in mole percent? 25.0 g Ag, CAg = 0.235 J/gC Part B: If the butane is warmed to 25 C, how much liquid butane is present? 7) 27) Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as gaining heat from the surroundings? Business, Finance, Economics, Accounting, Operations Management, Computer Science, Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical . In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. E. The value of pH is 2.13. C. 150 g C. The reaction mixture will contain equal concentrations of A and B. C. Ionic bond forces CBSE MCQs lay a stronger foundation of concepts in students that can be useful for them in their later stages to prepare for any competitive exams. The equilibrium mixture contained 1.37 10 2 M HI, 6.47 10 3 M H2, and 5.94 10 4 M I2. For example, for the following equilibrium: H2(g) + I2(g) 2 HI(g); For . Belgium, (+ Albania, (+ 968) A. F2 An aqueous solution contains 0.10M H 2S and 0.20M H Cl . It is the best methodology to chip away at the finished result. Netherlands, (+ Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction is higher than the rate of the reverse reaction. is Keq = 230 at 300 C. 2.34 10-7 B. What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? 100 A) Q does not change with temperature. 2 NO(g) + O2(g) ' 2 NO2(g) A. A) N2O4 (g) 2NO2 (g) Xx+(aq) + e-(aq) Xx(s) , 64) 351) A. viscosity Hydrogen and nitrogen react to form ammonia according to the following balanced chemical equation: \ce {3H2 (g) + N2 (g) <=> 2NH3 (g)} \nonumber Values of the equilibrium constant at various temperatures were reported as K_ {25C} = 3.3 \times 10^8, K_ {177C} = 2.6 \times 10^3, and K_ {327C} = 4.1. If the temperature is raised, then the forward reaction is favored. 57.0 kJ B. 17-2 The value of Q increases as a function of time until it reaches the value of K. b) No, Q would still increase with time because the [I2] would decrease in exactly the same way as [H2] decreases. Maldives, (+ C) roughly equal amounts of products and reactants are present Albania, (+ By using Laplace transforms, solve the following differential equations 2 NO (g) N2 (g) + O2 (g). Provide an explanation. The equilibrium constant expression for the reaction is Kc = [HI]2 [H2][I2] Substituting the equilibrium concentrations into the equilibrium expression, Kc = (0.30)2 (0.012)(0.15) = 50 The magnitude of the equilibrium constant is 50 for the temperature at which the data was collected. In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends on. 230) Given: Sweden, (+ Assuming no loss of heat to the surroundings, what is the final temperature of the mixture? [The vapor above an aqueous solution contains 17.9 mg water per liter at 25 C] E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Tajikistan, (+ South Korea, (+ 44) . Note: Names of real elements have been changed to 'Xx' and 'Xa'. An analyte containing 0.12 L of a 0.025 M solution of a strong acid is titrated with a 0.220 M solution of a strong base. The lightbulb is turned on for 0.015 h, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.89 L against an external pressure of 1.0 atm] 32) 52) Using the equilibrium constant calculated in 2, calculate . Cambodia, (+ 2HI (g) H2 (g) + I2 (g) A) 100 B) 0.50 C) 0.020 D) 2500 E) -50 C) 0.020 13) The Keq for the equilibrium below is 50. Test your critical thinking abilities by noting the Chemistry Multiple Choice Questions with Answers for Class 12 PDF all alone. HI(g)12H2(g)+12I2(g), The equilibrium constant is given for one of the reactions below. Nepal, (+ Cambodia, (+ Assume excess SiO2. [Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 C] A 250 mL sealed flask contains 0.65 g of butane at 22C.] D. - 1.23 x 103 kJ/mole. 1.14 J/(g C) 880) Xs3+ + 3 e- Xs(s) : E = -0.55 V Consider the first-order decomposition of compound A according to D) [CO2][H2O] / [H+][HCO3-] C. dipole-dipole E. Xd + 2 H+ Xd2+ + H2. C. 0.0010 A. [The half-life for the radioactive decay of U238 is 4.5 billion years and is independent of initial concentration] An equilibrium mixture contains 2 moles of sulphur dioxide, 1 mole of oxygen and 6 moles of sulphur trioxide. Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. Turkey, (+ 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. 977) C. State functions do not depend on the path taken to arrive at a particular state. [The decomposition of SO2Cl2SO2Cl2 is first order in SO2Cl2SO2Cl2 and has a rate constant of 1.46104 s1s1 at a certain temperature] [Nitromethane (CH3NO2) burns in air to produce significant amounts of heat. 263) Pakistan, (+ C 185 A P A. What is the osmotic pressure of this solution at 25 C? 2NH 3 (g) N 2 . M. What is the half-life, t1/2, for this reaction in units of seconds ? When a reactio. B. Q2. E. In equilibrium, the ratio [P] / [A] is equal to k / k'. The equation for the dissociation of hypochlorous acid is: Understudies who are planning for serious assessments like NTSE, Olympiad, and so forth for class 12. 11.90 B. 30.5 C India, (+ 960) Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. B. Intramolecular forces The reaction : N 2O4 2N O2 J & K CET 2018 8. Qc = 0.120 < Kc reaction proceeds to products. So, visit our site and easily find MCQs for all subjects classwise. mmmmmmmH2 + mmlI2 mll2HI I/molL-1:ml1.000mm1.000mml1.000 C/molL-1:mm-xmmmll-xmmml+2x E/molL-1:m1.000-xm1.000-xm1.000+2x 2A+B2C+2D Students also can take a free test of the Multiple Choice Questions of Class 12 Chemistry. }}+5y=26e^{3t},~~~~~y_{0}=1,~y_{0}^{^{\prime }}=5. A. C. 0.00048 Note: Names of real elements have been changed to 'Xd'. Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. 31) D. CH3OH, D. CH3OH D) 2 SO3 (g) 2 SO2 (g) + O2 (g) France, (+ 971) 2HI (g) H2 (g) + I2 (g) Kc depends on how the chemical equation is written, but not on how the reaction is carried out. The equilibrium constant (K ) would be __________. \mathrm{Co}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Co}(\mathrm{s}) & \text { voltage }=-0.28 \mathrm{~V} \\ Part A: How much butane is present as a liquid at 22C? C) addition of some to the reaction vessel (V and T constant) To score well take a stab at rehearsing the rundown of Multiple Choice Type Questions gave in the connections underneath. Calculate the pOH of a solution that contains 7.8 x 10-6 M OH- at 25C. N2 (g) + 3H2 (g) 2NH3 (g) Utilizing the assets accessible you can score well in the test. Mauritius, (+ E) only reactants are present, 23) The equilibrium constant for the gas phase reaction Use the bond energies provided to estimate Hrxn for the reaction below. Maldives, (+ A. K<1 What is the best strategy while answering the Multiple Choice Questions for exams? South Korea, (+ Q: Calculate mole fraction of the solution. H2(g)+I2(g)2HI(g) Which of the following statement is/are true? 2) Which one of the following is true concerning the Haber process? Equilibrium constant expression in terms of partial pressures 64) C) [H3O+][F-] / [HF][H2O] E. -1.35C. All reactant and product concentrations are constant at equilibrium. E. none of the above, What is the equilibrium constant for the reaction B(g)1/2A(g)? E. 0.169 M, From Midterm Exam 2: Egypt, (+ C. 1.28 1.00 10-14 United Kingdom, (+ - 1.92 x 103 kJ/mole When a reaction component is a gas, we can also express the amount of that chemical at equilibrium in terms of its partial pressure. In a particular experiment, the partial pressures of H 2 and I 2 A. ion-ion What is the rate constant, k, for this reaction in units of L mol-1 s-1. Russia, (+ 263) Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat? E) only reactants are present, 24) The equilibrium constant for the gas phase reaction 7154 Calculate K and Kp for this reaction. After equilibrium was reached, the partial pressure of NO dropped to 320 torr. C. 1.92 x 103 kJ/mole D. 13.16 Give the direction of the reaction, if K >> 1. (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. Part C: Calculate the change in the internal energy of the system, E. South Korea, (+ Terms T&C. A. adding SO3 45) C) K does not depend on the concentrations or partial pressures of reaction components. E) Q is the same as Keq when a reaction is at equilibrium. United States, (+ -4.56C with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? D) only products are present A) 2HI (g) H2 (g) + I2 (g) South Africa, (+ subject to the given initial conditions. E. 2.11, From Midterm Exam 2: C) slow the reverse reaction only B. Xd + 2 H+ 2 Xd+ + H2 7) [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. There is not a viable replacement for reliable practice whether one needs to comprehend an idea completely or one needs to score better. What is the vapor pressure of propane at 25.0 C? 1) E) decrease the partial pressure of CO, D) increase the value of the equilibrium constant, 34) Consider the following reaction at equilibrium. Half-reaction reaction potentials you might need are: By clicking Agree & join, you agree to the Study24x7 - A liquid can be converted to a gas by heating. What is the specific heat of benzene? 52) E) 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s), 29) Which reaction will shift to the right in response to a decrease in volume? Q: What is the value of the equilibrium constant, Kp, for the reaction? 2SO2 (g) + O2 (g) 2SO3 (g) 82) Which statement describes best the pH of a 0.010 M solution of this acid. A. Let us consider that one mole of H2 and one mole of I2 are present initially in a vessel of volume V dm3. C. 22.1 kJ mol-1 At 100 C and 1 atm, water is in which phase? 1) 41) Georgia, (+ D. 12.79 Q: How long will it take for the concentration of SO2Cl2 to decrease to 25% of its initial concentration? E. -91 kJ, Identify an element that is NOT in its standard state. D. 5.11 Tajikistan, (+ Initially, the vessel contains only X2 at a pressure of 1.75 atm. 224) This buffer has a pH = 4.74. Denmark, (+ D. +473 kJ The equilibrium constant K will increase above 2.010-3 (answer is debatable), From Midterm Exam 2: 0.269 D. 173 g E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? 966) Moreover, access the Chapter Wise MCQs of Class 12 Chemistry and set up the points and subtopics in it. 1 Answer Ernest Z. Dec 11, 2017 The equilibrium concentrations are: [H2] = [I2] = 0.681 mol/L [HI] = 2.362 mol/L Explanation: The balanced equation is H2 + I2 2HI Now, we can set up an ICE table. 351) Which metal in the list is the best reducing agent? [The reaction X2(g)2X(g) occurs in a closed reaction vessel at constant volume and temperature. b. Let's flip the above reaction. If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. C) roughly equal amounts of products and reactants are present D. 25.0 g granite, Cgranite = 0.79 J/gC Strong bonds break and weak bonds form. What is the need of NCERT Solutions and CBSE MCQs? United States, (+ 380) Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] D) only products are present 45) D) at low temperature and high pressure A. Q: If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? . 33) Yes, our website is the one-stop search for all CBSE Board Examination related sources like questions papers, syllabus, exam pattern, sample papers, and Multiple choice questions papers. Understudies who are planning for State board assessments in Chemistry like PUC, Intermediate tests, and so on. The value of pH is somewhat higher than 6.65. Explain this phenomenon, keeping in mind that sound is reflected from the surface of the water and that the temperature of the air just above the water's surface is usually less than that at a height of 10m10 \mathrm{~m}10m or 20m20 \mathrm{~m}20m above the water. 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ 977) CO2 (s) + H2O (l) H+ (aq) + HCO3- (aq) Swaziland, (+ \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightleftharpoons \mathrm{Ag}(\mathrm{s}) & \text { voltage }=+0.80 \mathrm{~V} \\ Part A: Use the wattage of the lightbulb and the time it is on to calculate the heat transferred, q, in joules. United Arab Emirates, (+ 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. A. What is the standard free energy change (Grxn) for this reaction? [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] Q: What is the percent ionization of ammonia at this concentration? Download the Study24x7 App, so you can connect and collaborate. 2A(g) + B(g) A2B(g) Kc = ? D.2.08 10-2 J A. What is the primary source of water stored in an aquifer? [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w] the sign of E for the system: negative (-) = The system expands and the surroundings get hotter positive (+) = The system contracts and the surroundings get colder Which of the following is TRUE if E sys = - 115 J? B. HPO42- Bangladesh, (+ Belgium, (+ From Midterm Exam 2 : Hydrogen iodide undergoes decomposition according to the equation 2HI (g) H2 (g) + I2 (g) The equilibrium constant Kp at 500 K for this equilibrium is 0.060. Understudies able to speed up and precision in settling these inquiries are expected to rehearse however much as could be expected. Part B: Calculate the work done, w. [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. B.54.4 J 3) Which one of the following will change the value of an equilibrium constant? E. increase pressure, The following reaction is exothermic. Hydrogen and iodine react to form hydrogen iodide, like this: H_2 (g) + I_2 (g) rightarrow 2 HI (g) Also, a chemist finds that at a certain temperature the equilibrium mixture of hydrogen, iodine, and hydrogen iodide has the following composition: Calculate the value of the equilibrium constant K_p for this reaction. New Zealand, (+ Catalysts have no effect on equilibrium situations. A reaction of the type 2A P has the following rate law: rate = k[A]2. 0.13 M C. 4.3 M D. 0.039 M @X UBBIS Digitized by the Internet Archive in 2019 with funding from University of Alberta Libraries https ://arch i ve . a. 6 H2(g) + 6 D2(g) 12 HD(g) Kc = ? 234) A galvanic cell designated as 960) CH4(g)+Cl2(g)CH3Cl(g)+HCl(g), H=99.60 kJ What is the mole fraction xA of liquid A in this mixture. Hrxn= npHf(products) nrHf(reactants) Xn2+ + 2 e- Xn(s) : E = 1.33 V United Arab Emirates, (+ C. 12.28 Careful quan titative dehydration experiments [17] show that at 173 K each protonated form o f the anion has a distinct resonance, see Figure 8 . (+ 10.9 kJ mol-1 When a liquid evaporates in a closed container, molecules with relatively higher kinetic energy escape the liquid surface into the vapour phase and number of liquid molecules from the vapour phase strike the liquid surface and are retained in the liquid phase. How is vapor pressure related to temperature? H2 (g) + I2 (g) 2HI (g) Provide your answer in units of mol L-1. E) none of the above, 12) The Keq for the equilibrium below is 50. 2NO2 (g) 2NO (g) + O2 (g) A. The standard reduction potential for the nickel(II) ion is 0.26 V and that of the aluminum(III) ion is 1.66 V] Understudies who are planning for Central board assessments in Chemistry specifically CBSE, ICSE, and NIOS Board. 27.3 kJ mol-1 Q6. C) The reaction is at equilibrium when Q < Keq. C. +873 J mol-1 D. At any time, the ratio [P] / [A] is equal to k' / k. corresponds to which redox cell reaction ? B. Hrxn can be determined using constant pressure calorimetry. H2(g) + Br2(g) 2 HBr(g) Kc = 3.8 104 B. The value of pH is somewhat higher than 2.13. Mexico, (+ Q: Calculate the molality of the solution. 7.2 10-5 M and 92) B) At equilibrium, the reaction quotient is undefined. B. CP is always at a higher temperature relative to TP. 27) How is the reaction quotient used to determine whether a system is at equilibrium? Bangladesh, (+ 92) Finland, (+ A) increase the rate of the forward reaction only Rehearsing NCERT Online Chemistry MCQ Questions for Class 12 with Answers is perhaps the most effective way to plan for the CBSE Class 12 board test. Compute the pH at 25C after 3 mL of the base has been added. Ti (s) + 2Cl2 (g) TiCl4 (l) Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. C. 62.5C Which statement applies to the equilibrium of this reaction after the pressure is changed to 2 bar, but with the temperature remaining at 30C ? A. C. The reciprocal concentration, [A]-1, changes linearly with time. C. -486 kJ C) N2 (g) + 2O2 (g) 2NO2 (g) . E. The reverse reaction is favored. D. 1-butanol Zimbabwe. B. CP is always at a higher temperature relative to TP. 234) 0.043 Bahrain, (+ 90) South Africa, (+ A. From Midterm 3: Isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 g of NaCl in enough water to produce 100. mL of solution. 25) At 400 K, the equilibrium constant for the reaction Determine the value of the missing equilibrium constant. A. Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. D. 12.9 kJ D) [H3O+][F-] / [HF] A) [H+][HCO3-] / [CO2] 977) 268) 4CuO (s) + CH4 (g) CO2 (g) + 4Cu (s) + 2H2O (g), 20) The equilibrium-constant expression for the reaction Tap on the individual Chapter connection of twelfth Standard Chemistry you need to practice and profit the comparing points MCQ Quiz Questions. How reactions can happened and produce H2 (hydrogen) and I2 (iodine) ? Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. A. D. 456 kJ India, (+ F 2100 universal tv remote manual ethanol is capable of forming hydrogen bonds with water good breakfast cereal for type 2 diabetes naturally with diet Of the three basic states of matter, the particles in gas are much . If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? B. A) products predominate D. The value of K remains, but the equilibrium is shifted towards more products. 1) Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction is lower than the rate of the reverse reaction. These various decision inquiries for twelfth class Chemistry will help you to improve calculated and subject information abilities. A. H2(g) One of these substances is a liquid at room temperature. SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l) Hrxn = -184 kJ 2 NO(g) + O2(g) 2 NO2(g) Hrxn = ? What is the Kw of pure water at 50.0C, if the pH is 6.630? For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction D. 1.85 B) N2O4 (g) 2NO2 (g) What factors cause changes between the liquid and gas state? Which one statement regarding the first-order reaction +238 kJ What state transition or transistions occur in carbon dioxide if you begin with a sample of carbon dioxide at 60.0 C at 50.0 atm and warm the sample to 10.0 C and 50.0 atm? Which change will shift the equilibrium to the left? In each table, there may be one statement that is false because it contradicts the other three statements. CHM152 Equilibrium Worksheet Key 1 Equilibrium Worksheet Key 1. [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ A compound is found to have a molar mass of 598 g/mol. For the reaction given in Part A, how much heat is absorbed when 2.80 mol of A reacts? 34) Check all that apply. 2SO2 (g) + O2 (g) 2SO3 (g) Afghanistan, (+ What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 31 C ? Germany, (+ A. - The vapor pressure of a liquid decreases with increasing temperature. HOCl(aq) + H2O(l) H3O+(aq) + OCl-(aq). 0.233 M Additionally, you can reconsider all Chemistry sections appropriately whenever and save significant season of yours during class tests and yearly tests readiness. Spain, (+ Asked by sumandeesinghrana | 12 Oct, 2010, 03:00: PM Expert Answer Dear Student For the reaction H 2 + I 2 --------> 2HI E. CP is always at a lower temperature relative to TP. Q: What is the mole fraction of hexane? A) some removal of from the reaction vessel (V and T constant) For the equilibrium of the dissociation reaction of the compound 'A2', the concentrations were found to be [A2] = 0.022 M and [A] = 0.13 M at 25C: Bond Bond Energy (kJ/mol) E) The reaction is at equilibrium when Q = Keq. Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. The heat of vaporization of the alcohol at 25 C is 45.4 kJ/mol, the specific heat of aluminum is 0.903 J/gC. B) 1.9 10-14 Bahrain, (+ Find the equilibrium amounts of these compounds if they all start out at 0.120 M. Solution: Determine Qc so that you know which direction the reaction will proceed. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. 380) United States, (+ - A gas can be converted into a liquid by cooling. (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? The isomerization of methylisonitrile to acetonitrile C) 2 SO3 (g) 2 SO2 (g) + O2 (g) Provide your answer in units of coulombs (C). What is the vapor pressure of propane at 20.0 C? Br2 (g) + Cl2 (g) 2BrCl (g) 0.093 M A. ..Keq = 6.2 x 10^2 46) E. H3O+. (look up phase diagram). Belgium, (+ H2 + I2 = 2 HI Since there is an equal number of each element in the reactants and products of H2 + I2 = 2HI, the equation is balanced. Each question has four options followed by the right answer. is Keq = 4.34 10-3 at 300 C. For a chemical equilibrium reaction H2 (g) + I2 (g) 2HI(g) write an expression for Kp (and relate it to Kc). Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25C, what is the osmotic pressure of the resulting solution? Mexico, (+ The rate constant for the reaction is 9.45 10-5 s-1 at 478 K. The half-life of the reaction when the initial [CH3NC] is 0.030 M is ________ s. From Midterm 3: From Midterm 3: Ghana, (+ 855) For both acid and base, 'strong' means fully dissociated. B) at high temperature and low pressure C. OH- From Midterm Exam 2: Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. Enter the email address you signed up with and we'll email you a reset link. Hrxn = ? B. B. Thank you for your participation! A. Xd + 2 H+ Xd2+ + 2 H2 C. 3.42 torr E. All of the above are true. [A] and [P] denote the concentrations of A and P, respectively. Georgia, (+