For which reaction low pressure and low temperature is helpful in obtaining a high equilibrium yield?
Correct answer: C. Option C
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
When the forward reaction proceeds with a decrease in the number of moles, the increased pressure will shift the equilibrium towards the right, which will decrease the number of moles and nullify the effect of increased pressure. This will increase the yield of the forward reaction. When the temperature of an endothermic reaction is increased, the reaction will proceed in the forward direction so as to absorb heat and nullify the effect of increasing temperature. This will increase the value of the equilibrium constant Kc and increase the yield of the reaction. This is true for the reaction in option C, i.e., Cl2 (g)+2O2(g)→2ClO2(g) H=−49.4k.cals.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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