Question

In which of the following case $K_p = K_c$ ?

• A. $\ce{N2 + 3H2 <=> 2NH3}$
• B. $\ce{PCl5 <=> PCl3 + Cl2}$
• C. $\ce{N2 + O2 <=> 2NO}$
• D. $\ce{2SO2 + O2 <=> 2SO3}$

Answer 1

Answer: (C)

$\ce{N2 + O2 <=> 2NO}$

Answer 2

$K_{p}=K_{c}\left(RT\right)^{\Delta n}$, where $\Delta n$ = change in gaseous molecules $N_{2}+3H_{2} {\rightleftharpoons} 2NH_{3} ; \Delta n=-2$ $\therefore k_{p}