A chemical reaction is exothermic if heat is released by the system into the surroundings. Because the surroundings is gaining heat from the system, the temperature of the surroundings increases.

In an exothermic reaction, the activation energy (energy needed to start the reaction) is less than the energy that is subsequently released, so there is a net release of energy.

Mar 9, 2016 · An exothermic reaction is defined as a reaction that releases heat and has a net negative standard enthalpy change. Examples include any combustion process, rusting of iron, and freezing …

May 8, 2025 · Exothermic reaction: Releases heat (feels hot). These energy exchanges are part of a broader field known as thermochemistry, which studies the heat involved in chemical and physical …

Jul 30, 2024 · Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. Photosynthesis is a good example of an endothermic reaction.

Mar 28, 2025 · That’s an exothermic reaction at work! The combustion of wood or wax involves breaking chemical bonds in the fuel and combining it with oxygen, producing carbon dioxide, water vapor, …

Jan 1, 2026 · An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products.

The meaning of EXOTHERMIC is characterized by or formed with evolution of heat. How to use exothermic in a sentence.

An endothermic reaction occurs when energy is absorbed from the surroundings in the form of heat. Conversely, an exothermic reaction is one in which energy is released from the system into the …

Jul 8, 2024 · An exothermic reaction is a type of chemical reaction that releases energy to its surroundings, primarily in the form of heat, but sometimes as light, electricity, or sound.