Question

(a) What is the relation between thresh hold energy, activation energy and energy of reactants.
(b) Draw the reaction profile of an exothermic reaction.
(c) Rate constant of a first order reaction,
A → product is 0.016 min-1. Calculate the time required for 80% of the reaction to be completed.

Answer 1

Explanation:

(a) The minimum energy that molecules need to have in order for a reaction to take place is called the threshold energy. Molecules that have a kinetic energy equal to or higher than the threshold energy will react. On the other hand, molecules that don't have enough kinetic energy will not react

(b)

(c) A first-order reaction has a rate proportional to the concentration of one reactant. First-order rate constants have units of sec-1. In other words, a first-order reaction has a rate law in which the sum of the exponents is equal to 1.

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