$(I)\, q + W \,\,(II)\, q \,\,(III) \,W \,\,(IV)\, H - TS$
${H_2}{O_{(g)}} + {C_{(s)}}\, \to \,\,C{O_{(g)}} + {H_{2(g)}}\,:\,\,\Delta H\, = \,\,131$ કિલોજૂલ $C{O_{(g)}} + \,\,\frac{1}{2}\,\,{O_{2(g)}} \to \,\,C{O_{2(g)}}\,:\,\,\Delta H\,\, = \,\, - 282$ કિલોજૂલ
${H_{2(g)}} + \frac{1}{2}{O_{2(g)}} \to \,{H_2}{O_{(g)}}\,:\,\Delta H\,\, = \,\, - 242\,\,$ કિલોજૂલ
$C_{(g)} + O_2$$_{(g)}$ $\to$ $CO_2$$_{(g)}$ : $\Delta H = x$ કિલોજૂલ
આપેલ : $\Delta H ^{\circ}=-54.07\,kJ\,mol ^{-1}$
$\Delta S ^{\circ}=10\,J\,K ^{-1}\,mol ^{-1}$
$(2.303 \times 8.314 \times 298=5705$ લો.)