Assuming that water vapour is an ideal gas, the internal energy change (∆ U) when 1 mol of water is vapourised at 1 bar pressure and 100^{\circ} {\C}, (given : molar enthalpy of vapourisation of water at 1 bar and 373 {\K}=41 {\kJ} {\mol}^{-1} and R=8.3 {\J} {\mol}^{-1} {\K}^{-1} ) [AIEEE 2007]

Correct Answer is : 37.904kJmol−1

AIEEE 2007 Solved Paper

Section: Chemistry

Question : 37 of 118

Marks: +1, -0

Assuming that water vapour is an ideal gas, the internal energy change (∆U) 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 and R=8.3Jmol−1K−1 )

[AIEEE 2007]

41.00‌kJ‌mol−1
4.100‌kJ‌mol−1
3.7904kJmol−1
37.904kJmol−1

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