Question

For which of the following reaction Kc=Kp(RT)−1
PCl5⇔PCl3+Cl2
2SO2+O2⇔2SO3
H2+I2⇔2HI
N2+3H2⇔2NH3

Answer 1

Answer:

K

p

=K

c

(RT)

Δn

If Δn=0,K

p

=K

c

If Δn>0,thenK

p

>K

c

If Δn<0,thenK

p

<K

c

For the reaction: H

2

(g)+Cl

2

(g)⇌2HCl

(

g)

Δn is the number of moles of gaseous products - number of moles of gaseous reactants in a balanced equation.

Δn=2−(1+1)=0

∴K

p

=K

c

Answer 2

Answer :- PCl5⇔PCl3+Cl2

in PCl5⇔PCl3+Cl2 , ∆ng = 1

according to question , Kc=Kp(RT)−1

so , Kp = Kc (RT )

∆ng 1 .