What happens to the equilibrium position of the exothermic reaction when temperature is increased?
Answer and explanation
Correct answer: B. Shifts left, decreasing yield of
- Step 1: According to Le Chatelier's principle, increasing temperature favors the endothermic direction to absorb added thermal energy.
- Step 2: Because the forward reaction is exothermic, the reverse reaction is endothermic.
- Step 3: Thus, equilibrium shifts left, decomposing ammonia and reducing yield.
Answer
Shifts left, decreasing yield of NH_3.
Why not the others: 'Shifts right, increasing yield of ' violates Le Chatelier's principle for exothermic reactions; 'Shifts right with no change in ' incorrectly treats temperature as a non-influencing factor; 'Does not shift' ignores thermal stress on equilibrium.
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