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Unformatted text preview: hernandez (ah29758) – H14: Thermo 3 – mccord – (51600) 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. This is your LAST homework on Quest for CH301. 001 10.0 points Consider the following processes. (Treat all gases as ideal.) I) The pressure of one mole of oxygen gas is allowed to double isothermally. II) Carbon dioxide is allowed to expand isothermally to 10 times its original vol- ume. III) The temperature of one mole of helium is increased 25 ◦ C at constant pressure. IV) Nitrogen gas is compressed isothermally to one half its original volume. V) A glass of water loses 100 J of energy reversibly at 30 ◦ C. Which of these processes leads to an increase in entropy? 1. II and III 2. V 3. I and II 4. I and IV 5. III and V 002 10.0 points For the four chemical reactions I) 3 O 2 (g) → 2 O 3 (g) II) 2 H 2 O(g) → 2 H 2 (g) + O 2 (g) III) H 2 O(g) → H 2 O( ℓ ) IV) 2 H 2 O( ℓ ) + O 2 (g) → 2 H 2 O 2 ( ℓ ) which one(s) is/are likely to exhibit a positive Δ S ? 1. All have a positive Δ S . 2. III and IV only 3. I and II only 4. II only 5. I, III and IV only 003 10.0 points For the evaporation of water from an open pan at 25 ◦ C, the values of Δ S for the water, the surroundings, and the universe must be, respectively, 1. positive, positive, positive. 2. None of these is correct....
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This note was uploaded on 09/01/2011 for the course PHY 303 taught by Professor Erskine/tsoi during the Spring '08 term at University of Texas.
- Spring '08