Using \(\Delta H = \Delta E + P\Delta V\)
\( \Rightarrow \,\Delta E = \Delta H - P\Delta V\)
\( = ( - 92.2\,kJ) - (40\,atm)( - 1\,L) \times \frac{R}{R}\)
\( = - 92.2\,kJ + (40\,atm\,L) \times \frac{{8.314\,(J{K^{ - 1}}\,mo{l^{ - 1}})}}{{0.0821\,(atm\,L\,{K^{ - 1}}\,mo{l^{ - 1}})}}\)
\( = - 92200\,J + 4050.66\,J\)
\( = - 88149.34\,J\)
\( = - 88.149\,kJ \approx - 88\,kJ\)
$CO_2(g) , CO(g)$ અને $H_2O(g)$ માટે $\Delta H^o_f$ના મૂલ્યો અનુક્રમે $-393.5, -110.5$ અને $-241.8\, kJ/mol$,
$CO_2(g) + H_2(g) \to CO(g) + H_2O(g)$ is :