For the exothermic reaction 2NO(g) → N2(g)+O2(g)
Correct answer: C. Decreases as temperature increases
- A. Is independent of temperature
- B. Increases as temperature increases
- C. Decreases as temperature increases
- D. Varies with the addition of N2 and O2
Explanation
In general, for an exothermic reaction, the reaction rate decreases as the temperature increases. This is because an increase in temperature provides more energy to the reactant's molecules, leading to a higher number of collisions and more effective collisions.
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About Le Chatelier's Principle
Le Chatelier's principle predicts how an equilibrium responds when concentration, pressure or temperature changes. Questions apply it to reversible reactions, identify the direction of shift and distinguish genuine equilibrium changes from the effect of a catalyst, which changes the rate of reaching equilibrium but not its position.
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