$PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$
માટે નીચેનામાંથી કઈ શરત સાચી છે ?
\(\mathrm{PCl}_{5(\mathrm{g})}=\mathrm{PCl}_{3(\mathrm{g})}+\mathrm{Cl}_{2(\mathrm{g})}\)
\(\Delta \mathrm{H}=\Delta \mathrm{E}+\Delta \mathrm{n}_{\mathrm{g}} \mathrm{RT}\)
\(\Delta n_{g}=\) Change in number of moles of product and reactant species.
since \(\Delta n_{g}=+v e,\) hence \(\Delta H=+v e\)
also one mole of \(\mathrm{PCl}_{5}\) is dissociated into two moles of \(\mathrm{PCl}_{5}\) and \(\mathrm{Cl}_{2}\) in the same phase.
Therefore, \(\Delta S=S_{\text {product }}-S_{\text {reactant }}\)
\(\Delta S=+v e\)
$298 \,K \,NH_3$$_{(g)}$ અને $H_2O_{(l)}$ ની નિર્માણ ઉષ્મા અનુક્રમે $-46.0$ અને $-286.0\, kJ \,mol^{-}$ છે.
($1\,L\,atm\, = 101.32\,J$)