For the reaction, H2(g) + I2(g) 2HI(g) , the equilibrium constant Kp 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. B) [SO2] / [SO3] E. 0.371, From Midterm Exam 2: +238 kJ 968) 28.4 kJ B. The Kc constant shows that the ratio of products to reactants is very small, indicating that a much higher concentration of reactants exists compared to the concentration of products. Decreased? E) -50, 13) The Keq for the equilibrium below is 50. (Pg.5) (c) Isobaric process:- An isobaric process is In a homogeneous equilibrium, all the defined as one in which the pressure of the reactants and products are in the same phase. Russia, (+ 380) Denmark, (+ All reactant and product concentrations are constant at equilibrium. Provide your answer in units of volts (V). South Africa, (+ A) 100 Understudies who are planning for different school tests, for example, unit-tests, term-tests, semester tests, half-yearly and yearly tests and assessments on Chemistry-Class 12. It is the best methodology to chip away at the finished result. B. What is the value of Keq for the following reaction? Strong bonds break and weak bonds form. E. 5.01 torr. +1251 J mol-1 Ghana, (+ From Midterm 3: Provide your answer in units of coulombs (C). 82) 28) Which reaction will shift to the left in response to a decrease in volume? is first order in CH3NC. (b)(b)(b) How much time does it take the crate to travel to the top of the ramp? Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. E. 29.8 kJ mol-1, What is the conjugate base of H2PO4- ? A) 25 D) [SO3]2 / [SO2]2[O2]2 968) 11.90 B. The equilibrium-constant expression depends on the _____ of the reaction. The heat capacity of the calorimeter is 4.90 kJ/C. You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. D. TP and CP are always at the same pressure. B) It is a process used for the synthesis of ammonia. 20) Equilibrium hydrogen is defined as a sample of hydrogen existing at the equilibrium ratio of orthohydrogen-parahydrogen at a given temperature (shown by the crimson dash-dot line in the figure). Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. Calculate the equilibrium constant for the following reaction at 25C: Nepal, (+ PART A: Swaziland, (+ B. Turkey, (+ Chemistry MCQ For Class 12 Chapter astute with Answers PDF Download. Close by that it helps the students with growing the overall appreciation in the subject and work on the data in the assessments. A. Phenomenon after H2 (hydrogen) reacts with I2 (iodine) This equation does not have any specific information about phenomenon. 34) The value of pH is somewhat higher than 2.13. Q: What is the mole fraction of hexane? 4CuO (s) + CH4 (g) CO2 (g) + 4Cu (s) + 2H2O (g), 20) The equilibrium-constant expression for the reaction 1) D. The value of pH is somewhat lower than 2.13. Equilibrium Constant Kp: Expression, Equation | StudySmarter Give the direction of the reaction, if K >> 1. C. The bonds that break and those that form are of approximately the same strength. Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. United Arab Emirates, (+ Netherlands, (+ (i) The value of K increases as the system approaches equilibrium. Initially, the vessel contains only X2 at a pressure of 1.75 atm. E. 0.158. [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. H2(g)+I2(g)2HI(g) , K=6.2102 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. A. Germany, (+ B) 0.50 Reaction rates but not the rate constants k and k' depend on temperature. =1.33x10-3 M and [H+] = 1.33x10-3M The equilibrium constant, K eq, for the ionization of acetic acid at 25 C is _____. D. CH3OH, D. CH3OH From Midterm Exam 2 : Turkey, (+ Oman, (+ 1-propanol Q: What is the theoretical cell potential assuming standard conditions? Assume excess SiO2. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. India, (+ What is the rate constant, k, for this reaction in units of L mol-1 s-1. D) [NH3]2[H2Se] Q: Calculate the [H3O+] of this rain. E. -91 kJ, Identify an element that is NOT in its standard state. South Korea, (+ CH4(g)+Cl2(g)CH3Cl(g)+HCl(g), H=99.60 kJ M. What is the half-life, t1/2, for this reaction in units of seconds ? is given by, 21) The equilibrium constant for the gas phase reaction Chemistry MCQ For Class 12 Chapter keen with Answers are a huge resource for the board test arranging. Please Help 1. In an experiment, 1.0 mol each of H 2 (g) and I 960) 966) The final temperature of the mixture upon reaching thermal equilibrium is 27.9 C] D) 1.90 1019 Strong bonds break and weak bonds form. Elements of Chemical Reaction Engineering Fifth edition.pdf Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. 1.14 J/(g C) D. Nothing can be concluded about K from Ecell. Match each term in Column A with its corresponding description in Column B. adulthood. [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. A closed vessel at 400 K is charged with 1.00 atm of Br2 (g), 1.00 atm of Cl2 (g), and 2.00 atm of BrCl (g). At body temperature (37C), Kw=2.41014] A) products predominate B) [(NH4)2Se] / [NH3]2[H2Se] Mauritius, (+ C) N2 (g) + 2O2 (g) 2NO2 (g) H2(g) + I2(g) 2HI(g) At equilibrium, the mixture is found to contain 1.580 mole of HI. C. 22.1 kJ mol-1 N2(g)+O2(g)+Br2(g)2NOBr(g). C. Xd2+ + 2 H+ Xd + H2 B) reactants predominate [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] B) 1.9 10-14 (NH4)2Se (s) 2NH3 (g) + H2Se (g) A. D) only products are present with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? E. In equilibrium, the ratio [P] / [A] is equal to k / k'. 20) Pakistan, (+ 82) Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] C. The reciprocal concentration, [A]-1, changes linearly with time. E) The reaction is at equilibrium when Q = Keq. O=O 498 Chemistry MCQ For Class 12 Chapter astute with answers PDF Download records are given here free of charge of cost. Calculating equilibrium constant Kp using partial pressures - Khan Academy Consider the equilibrium of two (ideal) gases according to 2A A2 with equilibrium constant K = 2.010-3 at a pressure of 1 bar and 30C. Bahrain, (+ New Zealand, (+ C) decrease the value of the equilibrium constant 31) 15.2: The Equilibrium Constant (K) - Chemistry LibreTexts Russia, (+ (Hint: Start with calculating the pH as if this were a monoprotic acid.) For the reaction H2(g) + I2(g) 2HI (g), the standard free energy is G^ > 0. D.2.08 10-2 J Let us consider that one mole of H2 and one mole of I2 are present initially in a vessel of volume V dm3. C. State functions do not depend on the path taken to arrive at a particular state. 25.0 g Ag, CAg = 0.235 J/gC 17.9 A homogeneous equilibrium reaction exists when all the components of the reaction are in the same phase (i.e., gas, liquid, solid, aqueous). Zimbabwe, (+ Saudi Arabia, (+ 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: 268) 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 7) The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ________. Science Chemistry For the following reaction, 2HI(g) --> H2(g) + I2(g) a. Ag+(aq)+eAg(s)Co2+(aq)+2eCo(s)Cu2+(aq)+2eCu(s)Pb2+(aq)+2ePb(s)Zn2+(aq)+2eZn(s)voltage=+0.80Vvoltage=0.28Vvoltage=+0.34Vvoltage=0.13Vvoltage=0.76V. - A gas can be converted into a liquid by cooling. Arsenic acid (H3AsO4) is a polyprotic acid with Ka1 = 5.510-3, Ka2 = 1.710-7, and Ka3 = 5.110-12. Write an equilibrium constant expression b. B. CP is always at a higher temperature relative to TP. Catalysts have no effect on equilibrium situations. By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and exactness which can help them during their board test. Q: If a reaction mixture is initially 0.20 M in X, what is the concentration of X after 151 seconds? A) Q does not change with temperature. 230) Use the bond energies provided to estimate Hrxn for the reaction below. cors.archive.org B. Compute the pH at 25C after 3 mL of the base has been added. 20) Both TP and CP are located on the solid/liquid phase boundary. 7154 E) none of the above, 12) The Keq for the equilibrium below is 50. 48) Egypt, (+ Solution Verified by Toppr Correct option is D) For the reaction, H 2(g)+I 2(g)2HI(g), the number of moles of gaseous reactants is equal to the number of moles of gaseous products. . B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. Which statement is true of an endothermic reaction? E. -24.5 kJ, Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J/gC. PPT Chemical Equilibrium - Berkeley City College C. 2.13 10-14 By this, you can dominate CBSE Class 12 Chemistry and play with words without any problem. . 2. Consider the reaction: H2 (g) + 12 (9) ~ 2 HI (g) Kp = 92.6 Consider an acetate buffer that is a mixture of 0.20 M acetic acid and 0.20 M sodium acetate. 1.72 Q3. What Is The Equilibrium Expression For H2 I2 2Hi? Quick Answer 977) PDF Chapter 15 Practice Questions - umb.edu In each table, there may be one statement that is false because it contradicts the other three statements. B. SiH4 From Midterm Exam 2: H2+I2----> 2HI equilibrium shift - CHEMISTRY COMMUNITY
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