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Unformatted text preview: r at - 20.5 C and the container is sealed and equilibrated. Given the thermodynamic data provided in the data section for substance Y, determine the equilibrium pressure of the vapor phase at this temperature. 4 4 3 4 4 3 a) 1.34x10 Pa b) 6.10x10 Pa c) 8.20x10 Pa d) 9.41x10 Pa e) 2.56x10 Pa f) 1.10x10 Pa Show your calculations and state your assumptions! Question 13: (5 points) The state function whose change at constant temperature and pressure is defined as the maximum non- expansion work is equal to: a) U b) U+pV c) S d) PV e) U+pV- TS f) U- TS Justify your reasoning. 4 Question 14: (5 points) The temperature dependence of the vapor pressure of the liquid phase of a substance can be approximated by the relation ln(P) = 21.38804 – 3776.53 /...
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