Question

3. Answer the following questions based on the reaction coordinate diagram below: Reaction pathway a. How many transition states are present? Label on the diagram. b. How many intermediates are present? Label on the diagram. c. Is the reaction endergonic or exergonic? d. What is the rate-limiting step for this reaction?

Answer 1

solution:

a)

For a given step, transition state has highest energy. So, number of transition state is 2 whic i shown in figure.

b)

Other than reactants/products, the reaction intermediate has lowest energy.

here, At point A energy is lowest other than reactant or product. number of intermidiate is 1

c)

for endothermic step, heat energy is absorbed so the product has higher energy than reactants.

For exothermic step, heat energy is evolved so the product has lower energy than reactants.

therefore,reaction is exergonic or exothermic

d)

from point A to B is rate deterniming step.

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