Chemistry - Thermodynamics - I Question with Solution | TestHub

${\Delta }_{\text{vap }}{\mathrm{H}}^{\ominus }$ for water is $+40.79\mathrm{kJ}{\mathrm{mol}}^{-1}$ at 1 bar and $100{}^{\circ }\mathrm{C}$. Change in internal energy for this vapourisation under same condition is $\mathrm{kJ}{\mathrm{mol}}^{-1}$. (Integer answer) (Given $\mathrm{R}=8.3{\mathrm{JK}}^{-1}{\mathrm{mol}}^{-1}$)