Which type of reaction is characterized by an increase in temperature due to energy release?

The correct response identifies an exothermic reaction, which is defined by the release of energy, typically in the form of heat. This release of energy leads to an increase in temperature in the surroundings. During an exothermic reaction, the products have lower energy than the reactants, and the excess energy is expelled, making the environment warmer.

For example, combustion reactions, such as burning fuel, are classic exothermic reactions where heat and light are produced, demonstrating a noticeable temperature rise.

In contrast, an endothermic reaction absorbs energy from the surroundings, resulting in a decrease in temperature. Catalytic reactions involve the use of a catalyst to speed up the reaction without altering the energy change, and reversible reactions can proceed in both directions but do not inherently indicate energy changes in terms of heat release or absorption.