Question

A swimmer coming out from a pool is covered with a film of water weighing about `80g`. How much heat must be supplied to evaporate this waateer ? If latent heat of evaporation for `H_(2)O` is `40.79 kJ mol^(-1)` at `100^(@)C`.

Answer 1

Amount of water present on the body of swimmer
`=80g=(80)/(18)mol e`
Thus, heat required to evaporate `(80)/(18) mol e`
`H_(2)O=40.79xx(80)/(18)=181.2kJ`