Question

What is an exothermic reaction?

• A. A reaction in which energy is given off.
• B. A reaction in which energy is gained.
• C. A reaction in which energy is neither lost nor gained.
• D. A reaction where bonds are broken.
• E. A reaction where bonds are formed.

Answer 1

The correct option is A A reaction in which energy is given off.

An exothermic reaction is a reaction in which energy is given off.
Th enthalpy of reactants is higher than the enthalpy of products.
The enthalpy change of reaction is negative.
Reactants $\to$ products $+$ heat