Question

We know that the relationship between $K_c$ and $K_p$ is
$K_p=K_c(RT{)}^{\Delta n}$
What would be the value of $\Delta n$ for the reaction,
$N{H}_{4}Cl\left(s\right)\leftrightharpoons N{H}_3\left(g\right)+HCl\left(g\right)$

• A. $1$
• B. $0.5$
• C. $1.5$
• D. $2$

Answer 1

The correct option is D $2$

The relationship between Kp and Kc is

$K_p=K_c\left(RT\right)\Delta n$

Where ∆n = (number of moles of gaseous products) – (number of moles of gaseous reactants)

For the reaction,

$N{H}_{4}C1\left(s\right)\leftrightarrows N{H}_3\left(g\right)+HCl\left(g\right)$

$\Delta n=2–0=2$

thus, the correct answer is D.