Assuming that, water vapour is an ideal gas the internal energy (Delta U) when 1 mol of water is vapourised at 1 bar pressure and 100^(@)C (given : molar enthalpy of vaporisation of water at 1 bar and 373 K = 41 kJ mol^(-1) and R = 8.3 J K^(-1) mol^(-1))) will be

Assuming that, water vapour is an ideal gas the internal energy (Delta

1.	Assuming that, water vapour is an ideal gas the internal energy (Delta U) when 1 mol of water is vapourised at 1 bar pressure and 100^(@)C (given : molar enthalpy of vaporisation of water at 1 bar and 373 K = 41 kJ mol^(-1) and R = 8.3 J K^(-1) mol^(-1))) will be
Answer» `41.00kJ mol^(-1)` `4.100kJ mol^(-1)` `3, 790J mol^(-1)` `37.9 KJ mol^(-1)` SOLUTION :Reaction for the given condition is `H_(2)O_((L)) rarr H_(2)O_((G))` `Delta H = Delta u + Delta n_((g)) RT` `41 xx 10^(3) = Delta u + (1) xx 8.314 xx 373` `Delta u = 37898.878 KJ = 37900KJ`