Question
Chemistry Question on Equilibrium
A(g)⇌B(g)+2C(g) The correct relationship between KP, α, and equilibrium pressure P is:
A
KP=(2+α)1/2α1/2P1/2
B
KP=(2+α)1/2(1−α)α3/2P1/2
C
KP=(2+α)3/2α1/2P3/2
D
KP=(2+α)3/2α1/2P1/2
Answer
KP=(2+α)1/2(1−α)α3/2P1/2
Explanation
Solution
Consider the reaction at equilibrium:
A(g)⇌B(g)+21C(g)
At equilibrium, let the fraction dissociated be α. Then:
PA=(1−α)P,PB=2+ααP,PC=2(2+α)αP
The expression for KP is given by:
KP=PAPB⋅PC1/2=(2+α)1/2(1−α)α3/2P1/2