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Test02-docAA

# O substance m gmol fh 29815 k kjmol c2h5oh l

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Unformatted text preview: - - - 128.4 - - - 2 o Cpm 298.15 K (J/K.mol) 35.3 33.9 131.3 28.8 Question 8: (10 points) o o Given the value for the standard vaporization enthalpy of H2O at 100. C and 1 atm (ΔvapH = 40.7 kJ/mol), calculate the change in entropy for a system composed of 1.30 mol of water as a result of the reversible o (very slow) decrease in temperature from the initial state characterized by 1.30 mol H2O(g) at 130. C and o 1.00 atm to a final state characterized by 1.30 mol H2O(l) at 30. C and 1.00 atm. The relevant constant o o pressure molar heat capacities are CPm (H2O(l)) = 75.3 J/K.mol and CPm (H2O(g)) = 33.6 J/K.mol. Question 9: (5 points) o o Given the value for the standard vaporization enthalpy of H2O at 100....
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