question_answer

Standard enthalpy of vaporization \[{{\Delta }_{vap}}{{H}^{\Theta }}\] for water at \[{{100}^{o}}C\] is \[40.66\,kJ\,mo{{l}^{-1}}\]. The internal energy of vaporisation .of water at \[{{100}^{o}}C\] (in kJ \[mo{{l}^{-1}}\] is (Assume water vapour to behave like an ideal gas). [AIPMT (S) 2012]

A)  + 37.56        

B)  - 43.76

C)  + 43.76          

D)       + 40.66

Correct Answer: A

Solution :

For the above reaction,