The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is :
(Specific heat of water liquid and water vapour are 4.2 kJ K^1 kg^1 and 2.0 kJ K^1 kg^1; heat of liquid fusion and vapourisation of water are 334 kJ^1 and 2491 kJ kg^1, respectively). (log 273 = 2.436, log 373 = 2.572, log 383 = 2.583)