JEE Main Chemistry question
The degree of dissociation of PCl₅(α) obeying the equilibrium, PCl₅(g)⇌PCl₃(g)+Cl₂(g), is approximately related to the pressure at equilibrium by:
Answer: (B)
Solution
From Kp=4α²P/(1−α²), for α≪1, α≈√(Kp/4P)∝1/√P.
The degree of dissociation of PCl₅(α) obeying the equilibrium, PCl₅(g)⇌PCl₃(g)+Cl₂(g), is approximately related to the pressure at equilibrium by:
From Kp=4α²P/(1−α²), for α≪1, α≈√(Kp/4P)∝1/√P.