When 5 litres of a gas mixture of methane and propane is perfectly combusted at 0^oC and 1 atmosphere, 16 litres of oxygen at the same temperature and pressure is consumed, The amount of heat released from this combustion in kJ ($$\Delta $$H_comb. (CH₄) = 890 kJ mol^$$-$$1, $$\Delta $$H_comb. (C₃H₈) = 2220 kJ mol^$$-$$1) is

A reaction having equal energies of activation for forward and reverse reactions has

The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0^oC is

Standard enthalpy of vaporisation $$\Delta $$_vapH^o for water at 100^oC is 40.66 kJ mol^$$-$$1. The internal energy of vaporisation of water at 100^oC (in kJ mol^$$-$$1) is