State the effect of the following on the reaction 2SO2(g) + O2(g) �

1.	State the effect of the following on the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) + 189.4kJ at equilibrium: (i) Temperature is increased.(ii) The concentration of SO2 is increased.(iii) The pressure is decreased.(iv) Helium is added at constant pressure.
Answer» (i) As a balanced reaction is endothermic, equilibrium will shift in a backward direction with an increase in temperature. (ii) Increase in conc, of reactants, shift the equilibrium in the forward direction, therefore, upon increasing conc. of SO₂ equilibrium will shift in the forward direction or more of SO₃ will be formed. (iii) As backward reaction proceeds with the increase in the number of moles, the backward reaction will be favoured. (iv) The backward reaction will be favoured.

State the effect of the following on the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) + 189.4kJ at equilibrium: (i) Temperature is increased.(ii) The concentration of SO2 is increased.(iii) The pressure is decreased.(iv) Helium is added at constant pressure.

Answer»

(i) As a balanced reaction is endothermic, equilibrium will shift in a backward direction with an increase in temperature.

(ii) Increase in conc, of reactants, shift the equilibrium in the forward direction, therefore, upon increasing conc. of SO₂ equilibrium will shift in the forward direction or more of SO₃ will be formed.

(iii) As backward reaction proceeds with the increase in the number of moles, the backward reaction will be favoured.

(iv) The backward reaction will be favoured.

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State the effect of the following on the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) + 189.4kJ at equilibrium: (i) Temperature is increased.(ii) The concentration of SO2 is increased.(iii) The pressure is decreased.(iv) Helium is added at constant pressure.

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