The Claus process, which is used to remove sulfur found as sulfur dioxide in petroleum, is based on the reaction 2 H₂S(g) + SO₂(g) ⇌ 3 S(s) + 2 H₂O(g). 

(a) Use data from Appendix 2A to determine the equilibrium constant of this reaction at 25°C.

(b) Various changes (see the following table) are then made to this mixture. Considering each change separately, state the effect (increase, decrease, or no change) that the change has on the original equilibrium value of the quantity in the second column (or K, if that is specified). The temperature and volume are constant unless otherwise specified.

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Change (a) add S (b) add H₂S (c) remove H₂O (d) remove SO₂ (e) add SO₂ (f) decrease volume (g) increase temperature Quantity amount of H₂O amount of SO₂ amount of SO₂ amount of S K amount of SO₂ amount of SO₂