What is the change of molar Gibbs energy for the freezing of water at -10C? The vapor pressure of H2O (liquid, -10C) is 286.5Pa. The vapor pressure of H2O (solid, -10C) is 260Pa. At -10C the molar volume of supercooled water is 1.8 x 10^-5 m^3/mol and the molar volume for ice is 2.00 x 10^-5 m^3/mol.