When a graph of energy vs. reaction progress was graphed for the reaction A + B

Question

When a graph of energy vs. reaction progress was graphed for the reaction A + B rightarrow C + D, the following data was obtained: a) Draw a rough sketch of what this activation energy diagram looks like. Make sure axes and points are labeled appropriately. b) What is the numerical value of the activation energy obtained from the graph? c) Are reactants or products more stable? Explain. d) Is the reaction endothermic or exothermic? Explain. d) On the graph you drew in part A, show an example of what the reaction could look like if a catalyst was added.

Explanation / Answer

From the data,

a) energy diagram shown below

b) Activation energy = 140 - 100 = 40 kJ

c) Products are more stable as it has lower energy than the reactants

d) If a catalyt is added, a new activated complex would form which would have energy lower than 140 kJ as shown in picture.

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