Heat energy is released in an exothermic chemicalreaction.
The reaction in which energy is being released, and the overall energy change (enthalpy) is negative.
Chemical energy is released during a chemical reaction.
Exothermic, generally. Exo- is out, -thermic refers to heat energy. You could have an endothermic reaction with other energy released, say radiation or work, but it is less common.
Heat or light radiation
A reaction that releases energy is usually termed exothermic reaction. Energy is usually released as heat.
The general term for a chemical reaction that releases heat is an exothermic reaction. The energy released is called enthalpy.A reaction that releases energy is called an exothermic reaction.
What type of reaction requires less energy to break the original bonds than the energy released when new bonds form?
An exothermic reaction is a reaction where heat or light energy is released. An example of this type of reaction is burning a candle.
Energy is released during a decomposition reaction.
Exo -> Greek "Outside" Therm -> thérmē -> Greek "Heat" So an exothermic reaction releases heat energy. Related to that type of reaction is the endothermic reaction in which heat is absorbed into the reaction rather than being released by it.
exothermic reaction
chemicial reaction