The diagram shows the potential energy changes for a reaction pathway. (10 points)

A curved lined graph is shown. The y axis of the graph has the title Potential Energy. The x axis of the graph has the title Reaction Pathway. The graph curve begins at a higher level and ends at a slightly lower level. A vertical line labeled A, starting from the x axis till the beginning of the graph line is shown. A vertical line labeled B, starting from the x axis till the uppermost hump in the graph curve is shown. Another vertical line labeled C is shown from starting from the x axis till the point where the graph curve ends.

Part 1: Does the diagram illustrate an endothermic or an exothermic reaction? Give reasons in support of your answer.

Part 2: Describe how you can determine the total change in enthalpy and activation energy from the diagram and if each is positive or negative.

1) The diagram shows an exothermic reaction since the potential energy of the products is less than that of the reactants, meaning energy was released.

2) To find the change in enthalpy, determine the difference between the potential energy of the products and the potential energy of the reactants. (on this diagram, C-A) To find the activation energy, find the difference between the potential energy of the reactants and the "peak" of the curve (on this diagram, B-A). For this diagram, both the enthalpy and activation energy are positive.

PEYTONLAIRSEYGO PEYTONLAIRSEYGO · Answer 2

PEYTONLAIRSEYGO PEYTONLAIRSEYGO

Answer:

The diagram that was made by the student is incorrect. X represents the energy of reactants and Y represents the energy of products.

Explanation:

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