Question

For a chemical reaction ;
$A( g )+B( l ) \rightleftharpoons D( g )+E( g )$
Hypothetically at what temperature, $K_p=K_c$ (when, $R =0.08 \,I - atm / mol - K$ )

• A. $T=0 \,K$
• B. $T=1 \,K$
• C. $T=12.5 \,K$
• D. $T=273 \,K$

Answer 1

Answer: (C)

As $K_p=K_c(R T)^{ \Delta n_g}$
Here $\Delta n_g=1$
So, $K_p=K_c$ when $R T=1 \Rightarrow 0.08 \times T=1$
Thus $T=12.5 \,K$