\(\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})} ightarrow \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}\) Calculate the standard heat change of the reaction above if the standard enthalpies of formation of \(\mathrm{CO}_{2(g)}, \mathrm{H}_{2} \mathrm{O}_{(g)}\) and \(\mathrm{CO}_{(\mathrm{g})}\) in \(\mathrm{KJmol}^{-1}\) are \(-394,-242\) and \(-110\) respectively.
A. \(+262 \mathrm{KJ} \mathrm{mol}^{-1}\) B. \(-262 \mathrm{KJ} \mathrm{mol} \mathrm{m}^{-1}\) C. \(+42 \mathrm{KJ} \mathrm{mol}^{-1}\) D. \(-42 \mathrm{KJ} \mathrm{} \mathrm{mol}^{-1}\)
