\((\Delta \mathrm{Q})_{\mathrm{P}}=\mu \mathrm{C}_{\mathrm{p}} \Delta \mathrm{T}\left(\mu=\begin{array}{l}{\text { No. of molecules }} \\ {\text { Avogedro's na }}\end{array}\right)\)
or \(\quad \Delta \mathrm{T} \propto \frac{1}{\text { no of molecules }}\)