7.3.3.P5
1. A subsystem A is in thermal contact with its environment B, which together comprise an isolated system. Which of the above four situations can actually occur in the real world? (Choose all that apply.)
- Entropy of A increases by 5 J/K; entropy of B decreases by 5 J/K.
- Entropy of A increases by 5 J/K; entropy of B decreases by 3 J/K.
- Entropy of A increases by 3 J/K; entropy of B decreases by 5 J/K.
- Entropy of A decreases by 3 J/K; entropy of B increases by 5 J/K.
2. Which of the following conditions are necessary for a system to undergo a spontaneous process, if the system is held at constant temperature and pressure?
- ΔGsys < 0
- ΔGsys > 0
- ΔGsys < 0, ΔSsys > 0
- ΔGsys < 0, ΔSsys < 0
- ΔGsys < 0, ΔSsys = 0
- ΔGsys > 0, ΔSsys > 0
Ben Geller, Ben Dreyfus, and Joe Redish 5/21/12
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