4. Consider the following reaction: [7 marks] 2SO3(g) 250₂(g) + 0(g) AH = +196 kJ mol-¹ When 4.0 mol of sulphur trioxide

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4 Consider The Following Reaction 7 Marks 2so3 G 250 G 0 G Ah 196 Kj Mol When 4 0 Mol Of Sulphur Trioxide 1 (25.87 KiB) Viewed 35 times

4. Consider the following reaction: [7 marks] 2SO3(g) 250₂(g) + 0(g) AH = +196 kJ mol-¹ When 4.0 mol of sulphur trioxide were placed in a 6.0 dm³ volume container and allowed to reach equilibrium, 0.7 mol of oxygen were found in the equilibrium mixture. a. Calculate the amount, in moles, of SO, and of SO₂ in the equilibrium mixture. [2 marks] b. Write an expression for the equilibrium constant for this equilibrium. [1 marks] c. Calculate a value of Kc for this equilibrium. [2 marks] d. Explain the effect on the equilibrium position of this reaction if: [2 marks] (i) the temperature is decreased at constant pressure. (ii) the pressure is decreased at constant temperature