An unknown compound A dissociates at 500°C to give products as follows - A(g) ⇌ B(g) + C(g) + D(g) Vapour density of the equilibrium mixture is 50 when it dissociates to the extent to 10%. What will b

Question

An unknown compound A dissociates at 500°C to give products as follows - A(g) ⇌ B(g) + C(g) + D(g) Vapour density of the equilibrium mixture is 50 when it dissociates to the extent to 10%. What will be the molecular weight of Compound A –

Accepted Answer

Answer: 140 — ForA ⇌ B + C + D1 mole gives 3 molesTotal moles at equilibrium= 1 − α + 3α= 1 + 2αGivenα = 0.1Observed V.D. = 50Real Molecular Mass= 2 × V.D. × (1 + 2α)= 2 × 50 × (1 + 0.2)= 120

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