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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 water ? If latent heat of evaporation for `H_(2)O` is `40.79 kJ mol^(-1)` at `100^(@)C`.

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`q = mL =(80)/(18) xx 40.79 = 181.128 kJ`
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CENGAGE CHEMISTRY-THERMODYNAMICS-Ex 6.2
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