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Question: A quantity of PCl<sub>5</sub> was heated in a 2 litre vessel at 525 K. It dissociates as PCl<sub>5<...

A quantity of PCl5 was heated in a 2 litre vessel at 525 K. It dissociates as

PCl5(g) PCl3(g) + Cl2(g)

At equilibrium 0.2 mol each of PCl5, PCl3 and Cl2 is found in the reaction mixture. The equilibrium constant Kc for the reaction is –

A

0.2

B

0.5

C

0.1

D

0.05

Answer

0.1

Explanation

Solution

K = [PCl3][Cl2][PCl5]\frac{\lbrack PCl_{3}\rbrack\lbrack Cl_{2}\rbrack}{\lbrack PCl_{5}\rbrack}