The vaporization of liquid water, h, o() h20(g), has a reported vapor pressure at 25°c and 1 atm of 23.756 mm mercury (hg), or 3167.5 pascal (pa) (a) compare this value with that obtainable from the standard partial molar gibbs energies for water and its vapor (b) estimate an approximate enthalpy of vaporization (kj mol ) from te reported vapor pressure at 20°c, 2337.4 pa