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Unformatted text preview: 1 Chapter 16 Web Quiz Worked Solutions 1. Given CH 3 CO 2 H(aq) H + (aq) + CH 3 CO 2- (aq) at 25C, K a = 1.8 x 10-5 What is G at 25C for a solution in which the initial concentrations are: [CH 3 CO 2 H] = 0.10 M [H + ] = 2.0 x 10-8 M [CH 3 CO 2- ] = 0.010 M A. +50. kJ B.-50. kJ C. +23 kJ D.-23 kJ E. 27 kJ 2. A change of state that occurs in a system is accompanied by 64.0 kJ of heat, which is transferred to the surroundings at a constant pressure and a constant temperature of 300. K. For this process S surr is: A. 64.0 kJ B.-64.0 kJ C.-213 J/K D. 213 J/K 2 3. The second law of thermodynamics states that A. the entropy of a perfect crystal is zero at 0 K. B. the entropy of the universe is constant. C. the energy of the universe is increasing. D. the entropy of the universe is increasing. E. the energy of the universe is constant. 4. Which of the following statements is always true for a spontaneous process? I. S sys > 0 II. S surr > 0 III. S univ > 0 IV. G sys > 0 A. I B. III C. IV D. I and III E. III and IV 5. The third law of thermodynamics states A. the entropy of the universe is increasing....
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- Spring '08