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Chemical Process - Engineering

Q1:

At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system )

A P

B P

C P2

D 1/P

ANS:B - P

The correct answer is: P²

Explanation:

At a given temperature, the equilibrium yield of SO₃ from the oxidation of SO₂ is proportional to the square of the pressure (P²) due to Le Chatelier's principle. Increasing the pressure shifts the equilibrium towards the products (SO₃) in the reaction: 2SO2+O2⇌2SO32 \text{SO}_2 + \text{O}_2 \rightleftharpoons 2 \text{SO}_32SO2​+O2​⇌2SO3​ This is because the reaction results in fewer moles of gas on the product side, thus increasing the yield of SO₃ at higher pressures.