For which one of the following reactions Kp = Kc ?

Question

For which one of the following reactions Kp = Kc ? (A) N2+3H2 leftharpoons 2NH3  (B)  N2+O2leftharpoons 2NO  (C)  PCl5leftharpoons PCl3+Cl2  (D)  2SO3leftharpoons 2SO2+O2

Tardigrade Admin · Accepted Answer

Kp=Kc(R T)Δ ng where. Δ ng= gaseous product - gaseous reactant when Δ ng=0 then, Kp=Kc N2(g)+O2(g) leftharpoons 2 N O(g) Δ ng=2-2=0 Kp=Kc(R T)0 ∴ Kp=Kc

Q. For which one of the following reactions $K_{p} = K_{c}$ ?

$N_{2} + 3 H_{2} ⇌ 2 N H_{3}$

$N_{2} + O_{2} ⇌ 2 NO$

$PC l_{5} ⇌ PC l_{3} + C l_{2}$

$2 S O_{3} ⇌ 2 S O_{2} + O_{2}$

$K_{p} = K_{c} (RT)^{Δ n_{g}}$
where. $Δ n_{g} =$ gaseous product - gaseous reactant
when $Δ n_{g} = 0$ then, $K_{p} = K_{c}$
$N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)$
$Δ n_{g} = 2 - 2 = 0$
$K_{p} = K_{c} (RT)^{0}$
$∴ K_{p} = K_{c}$

Q. For which one of the following reactions Kp​=Kc​ ?

N2​+3H2​⇌2NH3​

N2​+O2​⇌2NO

PCl5​⇌PCl3​+Cl2​

2SO3​⇌2SO2​+O2​