practice_exam1_solutions_F

practice_exam1_solutions_F - 1 1 mole of water undergoes a...

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1. 1 mole of water undergoes a reversible transition from its liquid form to ice at constant pressure (P=1 atm) and temperature (T=0 0 C). The heat received by the surroundings in the course of this process is 6 kJ surr q = . A (20). What is the change of the entropy of the system (water), S, as a result of this process? / / 22J/K surr SqT q T ∆= = B (20). What is the change of the entropy of the surroundings, surr S ? /2 2 J / K surr Sq T C (20). What is H for the system in this process? Since it is a constant pressure process, 6 Hq k J ∆==

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D (20). What is G for the system in this process? 0 GH T S ∆= ∆−∆= (also this follows from the fact that this is a reversible process at constant P and T). E (10)* . Is it possible to calculate A based on the information given? If not, explain what additional (measurable) properties of water you would need to find A ice water MM AG P V G P ρρ  ∆=∆−∆ =∆−   we could find A is we knew the densities of ice and of liquid water.
2. A gas can be compressed reversibly via two processes shown in the figure below.

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practice_exam1_solutions_F - 1 1 mole of water undergoes a...

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