Question

What is Δn for the following equation in relating Kc to Kp?CH4(g) + H2O(g) ↔ CO(g) + 3 H2(g)-120-3-2

Answer 1

Answer: Δn for the following equation in relating Kc to Kp is 2.

Explanation:

The balanced chemical equation is:

$CH_4(g)+H_2O(g)\rightleftharpoons CO(g)+3H_2(g)$

Relation of $K_p$ with $K_c$ is given by the formula:

$K_p=K_c(RT)^{\Delta n_g}$

Where,

$K_p$ = equilibrium constant in terms of partial pressure

$K_c$ = equilibrium constant in terms of concentration

R = Gas constant

T = temperature

$\Delta n_g$ = change in number of moles of gas particles = $n_{products}-n_{reactants}=4-2=2$

Putting values in above equation, we get:

$K_p=K_c\times (RT)^{2}$

Thus the value of Δn for the following equation in relating Kc to Kp is 2.