Article
Article
Calorimetry
Article By:
Marsh, Kenneth M. Thermodynamic Research Center, Texas A&M University, College Station, Texas.
Last reviewed:March 2021
DOI:https://doi.org/10.1036/1097-8542.104500
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- Calorimetry, published June 2014:Download PDF
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The measurement of the quantity of heat transferred during chemical reactions, changes of state, mixing of substances, as well as other chemical and physical processes. The unit of energy in the International System of Units is the joule, symbolized J. Another unit still in use, although it is strongly discouraged, is the calorie, symbolized cal and defined as 4.184 J. Most calorimetric measurements are made at constant pressure, and the measured change is called the enthalpy change (Fig. 1). See also: Enthalpy; Heat transfer; Thermochemistry
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