It is known that the vapor pressure of pure water at 77C is41.847kPa, and at 100C is 101.325kPa
(a)Â Â Â Derive the relationship of vapor pressureto the temperature
(b)Â Â Calculate the vaporization enthalpy of water
(c)   What is the vapor pressure of water at 140℃?
(d)  1 mol superheated water, vaporized water vapor at141℃, 100kPa external pressure, calculate the △ S of thisprocess.
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