Question

1. what is an exothermic reaction?

a. a reaction that does not involve energy change
b. a reaction that absorbs energy from its surroundings
c. a reaction that only occurs at low temperatures
d. a reaction that releases energy to its surroundings

Explanation:

An exothermic reaction is defined as a reaction where energy is released to the surroundings. Option a is incorrect as all chemical reactions involve energy changes. Option b describes an endothermic reaction. Option c is not a correct general description of exothermic reactions as they can occur at various temperatures. Option d aligns with the definition of an exothermic reaction.

Answer:

d. A reaction that releases energy to its surroundings