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Practice B Test 4

# Practice B Test 4 - Livasy David Homework 9 Due Dec 5 2006...

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Livasy, David – Homework 9 – Due: Dec 5 2006, 4:00 pm – Inst: Donna C Lyon 1 This print-out should have 26 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. This is the final homework assignment for the semester. It is due Tuesday, December 5, by 4:00PM. 001 (part 1 of 1) 10 points For a given transfer of energy, a greater change in disorder occurs when the temperature is high. 1. False 2. True 002 (part 1 of 1) 10 points When a liquid boils, which of the following statements is true? 1. Δ S < 0 2. Δ T > 0 3. Δ T < 0 4. Δ S > 0 003 (part 1 of 1) 10 points When a sugar cube dissolves in a cup of coffee (an endothermic process), entropy changes of the sugar plus water, the surroundings, and the universe are, respectively, 1. positive, negative, positive. 2. negative, negative, negative. 3. positive, positive, positive. 4. negative, positive, positive. 5. None of these is correct. 004 (part 1 of 1) 10 points Liquid water freezing to crystalline ice is an example of a system going to a state with a higher degree of order. Which of the following is the best explanation of how this process can be compatible with the Second Law of Thermodynamics? 1. Since the process is not occurring at zero Kelvin, the Second Law is not relevant. 2. A higher degree of order means an in- crease in entropy, which is exactly what the Second Law requires. 3. The surroundings are undergoing changes in the direction of greater disorder. 4. Since no chemical change is taking place, the degree of order is not relevent. 5. Heat is flowing out of the system re- versibly, so it is allowed. 005 (part 1 of 1) 10 points Calculate the change in entropy of a large pail of water after 200 J of energy is reversibly transferred to the water at 20 C. 1. - 0.733 J · K - 1 2. +0.683 J · K - 1 3. - 200 J · K - 1 4. - 0.683 J · K - 1 5. +0.733 J · K - 1 006 (part 1 of 1) 10 points Based on the structures of each of the fol- lowing molecules, A) NO B) N 2 O C) CO 2 D) Cl 2 which would be most likely to have a residual entropy in their crystal forms at T = 0?

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