Answer: The expression for equilibrium constant is [tex]\frac{[NH_3]^2}{[H_2]^3[N_2]}[/tex]
Explanation: Equilibrium constant is the expression which relates the concentration of products and reactants preset at equilibrium at constant temperature. It is represented as [tex]k_c[/tex]
For a general reaction:
[tex]aA+bB\rightleftharpoons cC+dD[/tex]
The equilibrium constant is written as:
[tex]k_c=\frac{[C]^c[D]^d}{[A]^a[B]^b}[/tex]
Chemical reaction for the formation of ammonia is:
[tex]N_2+3H_3\rightleftharpoons 2NH_3[/tex]
[tex]k_c=1.6\times 10^2[/tex]
Expression for [tex]k_c[/tex] is:
[tex]k_c=\frac{[NH_3]^2}{[H_2]^3[N_2]}[/tex]
[tex]1.6\times 10^2=\frac{[NH_3]^2}{[H_2]^3[N_2]}[/tex]