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The entropy change associated with the conversion of \( 1 \mathrm{~kg} \) of ice at \( 273 \mathrm{~K} \) to water vapours at \( 383 \mathrm{~K} \) is
\( \mathrm{P} \)
(Specific heat of water liquid and water vapour are \( 4.2 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~kg}^{-1} \) and \( 2 \mathrm{kJK}^{-1} \mathrm{~kg}^{-1} \); heat of liquid fusion and vapourisation of water are \( 334 \mathrm{~kJ} \mathrm{~kg}^{-1} \) and \( 2491 \mathrm{~kJ} \mathrm{~kg}^{-1} \) respectively). ( \( \log 273=2.436 \), \( \log 373=2.572, \log 383=2.583 \) )
(1) \( 9.26 \mathrm{~kJ} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(2) \( 7.90 \mathrm{~kJ} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(3) \( 8.49 \mathrm{~kJ} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(4) \( 2.64 \mathrm{~kJ} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)


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