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$(R = 8.314\,J\,{\rm{degre}}{{\rm{e}}^{{\rm{ - 1}}}}mo{l^{ - 1}})$
$\Delta_{\text {vap }} \mathrm{H}-\Delta_{\text {vap }} \mathrm{U}=...... \times 10^{2} \,\mathrm{~J}\, \mathrm{~mol}^{-1}$. (Round off to the NearestInteger)
$\left[\right.$ Use : $\left.R=8.31\, \mathrm{~J}\, \mathrm{~mol}^{-1}\, \mathrm{~K}^{-1}\right]$
[Assume volume of $\mathrm{H}_{2} \mathrm{O}(\mathrm{l})$ is much smaller than volume of $\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$. Assume $\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$ treated as an ideal gas]
${H_2}O(g){\mkern 1mu} {\mkern 1mu} + {\mkern 1mu} CO{\mkern 1mu} (g){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \rightleftharpoons \,{H_2}(g)\, + \,C{O_2}(g)\, + \,Heat{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} $