3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

$N_2(g) + 3H_2(g) \to 2NH_3(g$) is

$-92.38\, KJ$ at $298\, K$. The internal energy change $\left( {\Delta U} \right)$ at $298\, K$ is ........$KJ$

(Given ${\Delta _{fus}}H = 6\, kJ\, mol^{-1}$ at $0\,^oC$,

$C_p(H_2O, l) =75.3\, J\, mol^{-1} \, K^{-1}$ ,

$C_p(H_2O, s) = 36.8\, J\, mol^{-1} \, K^{ -1}$ )