2007-12-19 16:51:50 · 4 answers · asked by bbyboy16 1 in Science & Mathematics ➔ Chemistry
When the energy absorbed to break the bonds of the reactants are less than the energy released when bonds are formed in the products, heat is released. This is because the potential energy in the reactants are higher than that in the products. So energy is released as heat, this is an exothermic rxn.
2007-12-19 18:46:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A chemical reaction will release heat when the product compounds/elements are more entropically stable than the reactants. In other words, if there are more or stronger bonds formed than broken in a chemical reaction, the reaction will release heat.
2007-12-19 17:30:06 · answer #2 · answered by The Frontrunner 5 · 0⤊ 0⤋
In an exothermic reaction (one which generates heat) the products have less potential energy than the reactants, therefore the products have more kinetic energy than the reactants (since energy is conserved).
Basically, this mean the physical configuration of the electrons goes from a high-energy state to a low-energy state, releasing energy in the process. The kinetic energy manifests itself in the form of heat.
2007-12-19 16:59:11 · answer #3 · answered by lithiumdeuteride 7 · 1⤊ 0⤋
reactions are categorized as endothermic & exothermic. Exothermic reactions evolve heat.because they are spontaneous.
2007-12-19 17:07:13 · answer #4 · answered by shree_ruok 1 · 0⤊ 0⤋