5) At 25°C the equilibrium constant of the reaction
$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ , (reaction 1)
is $K_{c,1} = 3.5 \times 10^8$. What are the values $K_{c,2}$ and $K_{c,3}$ of the equilibrium constants for the respective reactions
$\frac{1}{2}N_2(g) + \frac{3}{2}H_2(g) \rightleftharpoons NH_3(g)$ , (reaction 2)
and
$2NH_3(g) \rightleftharpoons N_2(g) + 3H_2(g)$ , (reaction 3)?