4C change of state# 4C10 pVT Surfaces 4C10.01 Compressing a Gas 02 Work = int(PdV) 4C30 Phase Changes, Liquid-Gas 01 Boiling to Freeze 4C31 Cooling by Evaporation 01 Evaporating Ether 4C33 Vapor Pressure 01 Dippy Bird 02 Boiling Water at Reduced Pressure