Enthalpy Change Definition

Enthalpy Change Definition: An enthalpy change is approximately equal to the difference between the energy used to break bonds in a chemical reaction and the energy gained by the formation of new chemical bonds in the reaction. It describes the energy change of a system at constant pressure. Enthalpy change is denoted by ΔH.

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Helmenstine, Anne Marie, Ph.D. "Enthalpy Change Definition." ThoughtCo, Nov. 28, 2014, thoughtco.com/definition-of-enthalpy-change-605090. Helmenstine, Anne Marie, Ph.D. (2014, November 28). Enthalpy Change Definition. Retrieved from https://www.thoughtco.com/definition-of-enthalpy-change-605090 Helmenstine, Anne Marie, Ph.D. "Enthalpy Change Definition." ThoughtCo. https://www.thoughtco.com/definition-of-enthalpy-change-605090 (accessed January 22, 2018).