Question

The Standard enthalpy of vaporization of water at 100.0 oC is 40.66 KJ*mol-1. The Cp,m values for the liquid and the vapor water are, respectively, 75.3 and 33.58 J*K-1*mol-1. Assume that the heat capacities are independent of temperature, and that the vapor behaves as an ideal gas.

a) Calculate \Delta S sys in taking one mole of liquid water at 25.0 oC and 1.00 atm to gaseous water at 95.0 oC and 0.500 atm.

b) Assume that the temperature and pressure of the surrounding are 25.0 oC and 1.00 atm, respectively calculate \Delta S surr for the same process.

c) Calculate \Delta S total for the same process.

d) In a single step, or single calculation calculate \Delta G for this process.

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Answer #1

als H20 48) H0e) T 2 4 nedn pi 298 (9- 21-65 3K b) -> 40-66x103 13.443 - ASun 2 98 A4=AM- TAS 2 C8x109

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