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?

Refer picture given below. (a) Calculate DeltaH for the reaction and the energy of activation for the forward reaction as well as backward reaction. (b) The dotted curve is in the presence of a catalyst. What is the energy of activation for the two reactions in the presence of catalyst? ( c) Will the catalyst change the extent of reaction?

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.