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.

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.

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 · Photosynthesis is a good example of an endothermic reaction. Combustion is an example of an exothermic reaction. The categorization of a reaction as endothermic or exothermic depends …

Mar 28, 2025 · It all comes down to chemistry – specifically, exothermic and endothermic reactions. These two types of reactions dictate whether heat is released or absorbed.

If the reaction is exothermic, we need to decrease the temperature to favor the products, because the reaction generates heat. Raising temperature for exothermic reactions, or lowering temperature for …

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

If energy is released by a reaction, the reaction is exothermic. If energy is absorbed by a reaction, the reaction is endothermic. When petrol burns via a combustion reaction, the energy released can be …

When a chemical reaction happens, energy is transferred to or from the surroundings. When energy is transferred to the surroundings, this is called an exothermic reaction and usually feels hot.