Question

Why does every chemical reaction require a certain amount of activation energy?

A. Energy is released when the reactants begin to react.

B. Energy lost to the environment during the reaction must be replaced.

C. Forming the activated complex requires energy,

D.The products have more potential energy than the activated complex.

E. The reactants have less potential energy than the products,

Answer 1

E is the correct answer because both endothermic and exothermic reactions require activation energy. the reactants have less potential energy than do the products. Energy must be input in order to raise the particles up to the higher energy level.

Answer 2

C. Forming the activated complex requires energy,

Step-by-step explanation:

For any reaction (whether exothermic or endothermic) the reactant molecules need some minimum amount of energy known as Threshold energy.

Reactant molecules have some internal energy and they require some extra amount of energy to reach the threshold energy which is known as activation energy.

This activation energy is required to from an activated complex.

The activated complex is formed where reactant molecules come closer to each other and undergo effective collision. This causes the formation of products.