Answer to Question #152116 in Chemistry for Alexis

Question

Determine the Kc of the synthesis of ammonia from nitrogen and hydrogen,

N2(g) + 3H2(g) ↔ 2NH3(g) at 300ºC. The equilibrium amounts of N2 and H2 are 1.24 M and the NH3 equilibrium amount is 4.55 M .

Answer 1

Solution:

The balanced chemical equation:

N₂(g) + 3H₂(g) ↔ 2NH₃(g) 

The equilibrium expression for the reaction system:

[N₂] = [H₂] = 1.24 M

[NH₃] = 4.55 M

Substitute the equilibrium concentrations into the equilibrium expression and solve for K_c:

Answer: K_c = 8.76 M^-2.