Question

An exothermic reaction is characterised by the positive value of delta H
True or false

Answer 1

Answer:

An exothermic reaction is characterized by the positive value of ∆H. An endothermic reaction is characterized by the positive value of ∆H. The reaction vessel becomes hot when an exothermic reaction occurs. Heat is evolved when an exothermic reaction occurs.

Explanation:

An exothermic reaction is characterized by the positive value of ∆H. An endothermic reaction is characterized by the positive value of ∆H. The reaction vessel becomes hot when an exothermic reaction occurs. Heat is evolved when an exothermic reaction occurs.

Answer 2

False, an exothermic reaction is characterized by positive value of delta H.

Explanation:

• Exothermic reaction is a reaction in which after the reaction heat is evolved or the solution become hot and the reaction in which heat is absorbed so that means there is endothermic reaction is happening.

• In exothermic reactions our product is on the low energy than the reactant by which we can say that the H2 ( final energy) - H1 (initial energy) = negative. Means delta H is negative which indicates the reaction is exothermic in nature.

• Similarly if we get H2 - H1 = positive which means final energy is greater than initial energy this condition indicates that the reaction is endothermic in nature.