\(q _{ v }=\Delta U =-280.5\,kJ\)
\(q _{ p }=\Delta H =(?)\)
\(\Delta II =\Delta U +\Delta n _{ g } RT\)
\(=-280.5-4.15 \times 0.29\)
\(=-280.5-1.2\)
\(=-281.7\, kJ\)
\(=-280.5+\left(-\frac{1}{2}\right) \times 8.3 \times 10^{-3} \times 290\)
$3 C _{2} {H _{2}}_{(g)} \rightarrow C _{6} {H _{6}}_{(l)}$, is $.....\,kJ \,mol ^{-1}$
($\Delta H$ અને $\Delta S$ તાપમાન સાથે બદલાતા નથી તેમ ધારો)