The gas phase reaction $2A(g) \rightleftharpoons {A_2}(g)$ at 400 K has $\Delta$G^o = + 25.2 kJ mol^-1.

The equilibrium constant K_C for this reaction is ________ $\times$ 10^$-$2. (Round off to the Nearest Integer).

[Use : R = 8.3 J mol^$-$1 K^$-$1, ln 10 = 2.3 log₁₀ 2 = 0.30, 1 atm = 1 bar]

[antilog ($-$0.3) = 0.501]