For the given chemical equation: 2X(g) + Y(g) ⇌ 2Z(g) + 8 kcal, which combination of pressure and temperature gives the highest yield of 'Z' at equilibrium?

Question

Prashant Kotian · Accepted Answer

Correct answer: D. The forward reaction produces heat (+8 kcal), so it is exothermic; thus, low temperature favours the formation of Z. The forward reaction also leads to a decrease in gaseous moles (3 moles to 2 moles), so high pressure favours the formation of Z. The combination of maximum pressure and minimum temperature (1000 atm and 100°C) is ideal. Therefore, correct answer is D.

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