In the presence of a catalyst, the heat evolved or absorbed during the reaction:

In the presence of a catalyst, the heatevolved or absorbed during the reaction

Why is heat evolved or absorbed in a chemical reaction ?

Assertiojn (A):A catalyst increases that rate of a reaction . ReasonR): In the presence of a catalyst,the activation energy of the reaction increases.

Heat may evolved or absorbed during a ______ change.

Why does heat get released // absorbed during chemical reactions?

Assertion: A catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction decreases.

Assertion: A catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction decreases.

A: A catalyst increases the rate of a reaction. R: In presence of a catalyst, the activation energy of the reaction increases.