Q 3017823780.     A swimmer coming out from a pool is covered with a film of water weighing about `18g`. How much heat must be supplied to evaporate this water at `298 K` ? Calculate the internal energy of vaporisation at `100°C`.

`Delta_text(vap)H^(⊖) ` for water at `373K = 40.66 kJ mol^(–1)`

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