The reaction between hydrogen and iodine may be represented by the equation H2(g)+ I2(g) → 2HI(g), and is exothermic. Therefore
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Correct Answer: Option D
Explanation:
The correct answer is D: a decrease in temperature will favour the forward reaction.
Here's why:
The reaction between hydrogen (Hâ‚‚) and iodine (Iâ‚‚) to form hydrogen iodide (HI) is exothermic, meaning it releases heat. According to Le Chatelier's principle, if the temperature is decreased, the system will shift to favor the exothermic reaction (which releases heat) in order to counteract the change and restore equilibrium. Therefore, a decrease in temperature will favor the forward reaction, which produces HI.
The correct answer is D: a decrease in temperature will favour the forward reaction.
Here's why:
The reaction between hydrogen (Hâ‚‚) and iodine (Iâ‚‚) to form hydrogen iodide (HI) is exothermic, meaning it releases heat. According to Le Chatelier's principle, if the temperature is decreased, the system will shift to favor the exothermic reaction (which releases heat) in order to counteract the change and restore equilibrium. Therefore, a decrease in temperature will favor the forward reaction, which produces HI.