Answer to Question #299386 in Chemistry for Pankaj

Question

Define equilibrium constant and for the following reaction

2NH↓3(g) ⇌ 2N↓2(g) +3H↓2 (g)

i. Write the expression for Kc.

ii. Relate Kc to Kp, and

iii. Relate Kc to Kx

Answer 1

Solution:

Balanced chemical equation:

2NH₃(g) ⇌ N₂(g) + 3H₂(g)

The expression for K_c:

Relationship between K_c and K_p:

K_p = K_c × (RT)^Δn

Δn = (moles of gaseous product) − (moles of gaseous reactant)

Δn = 4 − 2 = 2

Hence,

K_p = K_c × (RT)²

Relationship between K_c and K_x:

K_x = K_c × (P / RT)^Δn

Hence,

K_x = K_c × (P / RT)²