Question

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Answer 1

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Find out the mole fraction of PCl3

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Solution :

PCl5(g) ⟶ PCl3(g) + Cl2(g)

a 0 0 : Initially at equilibrium

a - x x x

Total moles at equilibrium = (a−x) + x + x = a + x

Now,

Mole fraction of Cl2=a+xx= Mole fraction of PCl3

Mole fraction of Cl2=0.3 (Given)

Therefore,

Mole fraction of PCl3=0.3

Hence the mole fraction of PCl3 is 0.3.

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