For the equilibrium PCl5(s)⇌PCl3(s)+Cl2(g), equilibrium constant at 600 K is KP=2.5 atm. The value of equilibrium constant Kc for the reaction PCl3(g)+Cl2(g)⇌PCl5(s)at the same temperature is

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0.05 mole.lit -1

19.7lit.mole -1

0.081 lit.mole -1

123.15 lit.mole -1

answer is B.

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Detailed Solution

PCl3(g)+Cl2(g)⇌PCl5(g)KP=12.5atm-1KC=KP(RT)Δn=(1/2.5)(RT)-1(∴Δn=-1)=19.7 mole -1. lit

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