1.

Assuming that water vapour is an ideal gas, the internal energy change (DeltaU) when 1 mol of water is vapourised at 1 bar pressure and 100^(@)C, (Given : Molar enthalpy of vapourisation of water at 1 bar and 373K=41kJmol^(-1)andR=8.3Jmol^(-1)K^(-1)) will be -

Answer»

`4.100kJmol^(-1)`
`3.7904kJmol^(-1)`
`37.904kJmol^(-1)`
`41.00kJmol^(-1)`

ANSWER :C


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