an Exothermic reaction
The process in which energy is given off is called an exothermic change. The energy released can be in the form of heat, light, electricity, or sound
Exothermic reaction.
Exothermic reaction.
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heating
A change of state where energy is removed from a substance is called an exothermic reaction. This chemical reaction releases energy in the form of light or heat.
When a substance loses energy, it becomes more compact. A gas would turn to liquid and a liquid would turn to solid.
When water has heat and energy it changes energy. The energy that it changes to is called thermal.
The energy which must be transferred to or from a sample of water in order to change it's state is called the Latent Energy or Latent Heat - for example Latent Heat of Evaporation or Latent Heat of Freezing.
Changing a substance from solid into a liquid is called a change of state or a change of phase. Melting is the name given to the change of state from a solid to a liquid.
The phase change of gas to plasma is called ionization.
Endothermic Reaction. Exothermic is a chemical reaction in which energy must be provided.