Botany2 moles of PCl5 was heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

2 moles of PCl5 was heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

  1. A

    0.266

  2. B

    0.53

  3. C

    2.66

  4. D

    5.3

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    Solution:

                    PCl5      PCl3  +  Cl2

    Initially :     2                 0          0

    at euil. : 2 × 60100    2 × 40100  2 × 40100

    Volume of container = 2 L

    KC = 2 × 40100 × 2 × 2 × 40100 ×22 × 60100 ×2=0.266

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