b
\({\text{log}}\frac{{{{\text{K}}_{\text{P}}}}}{{{{\text{K}}_{\text{C}}}}} + \log \,RT = 0\,\,\,\,\,\,\,\,\,\log \frac{{{K_P}}}{{{K_C}}} = \log {(RT)^{ - 1}}\)
\(\frac{{{K_P}}}{{{K_C}}} = R{T^{ - 1}} \Rightarrow {K_P} = {K_C}R{T^{ - 1}}\,\,\,\,\,\,\,\Delta n = - 1\)
\((2)\,\Delta n = [2] - [2 + 1] = - 1\)