Question

If water vapour is assumed to be a perfect gas,molar enthalpy change for vapourisation of 1 mol of water at 1bar pressure at 100 degree Celsius is 41kj / mol . calculate the internal energy change when 1 mol of water is converted to ice

Answer 1

Answer:

D

Explanation:

Assuming that water vapor is an ideal gas, the internal energy change (ΔUΔU) when 1 mole of water is vaporized at 1 bar pressure and 100∘C100∘C (molar enthalpy of vaporization of water at 1 bar and 373 K = 41 kJ/mol and R = 8.314 J/Kmol) will be

(A)4.100kJ/mol(C)37.904kJ/mol(B)3.7904kJ/mol(D)41.00kJ/mol