Calculate the entropy change when `1 kg` of water is heated from `27^(@)C` to `200^(@)C` forming supper heated steam under constant pressure. Given specific heat of water `= 4180 J Kg^(-1)K^(-1)`and specific heat of steam `= 1670 + 0.49 J kg^(-1)K^(-1)` and latent heat of vaporisation `=23 xx 10^(5) J kg^(-1)`.