The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

• H2O > C2H5OH > CS2
• CS2 > C2H5OH > H2O
• H2O > CS2 > C2H5OH
• CS2 > H2O > C2H5OH