Question

Compare the slope of the line on a potential energy diagram for an endothermic reaction and an exothermic reaction.

A) The slope is steeper for an endothermic reaction.
B) The slope is steeper for an exothermic reaction.
C) The slopes are equal for both reactions.
D) The slope varies depending on the reaction conditions.

Answer 1

The slope is steeper for an endothermic reaction.

Step-by-step explanation:

The slope of the line on a potential energy diagram represents the rate of change of potential energy as the reaction progresses. In an endothermic reaction, the reactants have higher potential energy than the products because energy is absorbed from the surroundings. This results in a steep upward slope on the potential energy diagram. On the other hand, in an exothermic reaction, the reactants have lower potential energy than the products because energy is released to the surroundings. This leads to a steep downward slope on the potential energy diagram. Therefore, the correct answer is A) The slope is steeper for an endothermic reaction.