Glossary of chemical terms

joule
	Joule (J) is the SI derived unit of energy, work, and heat. The joule is the work done when the point of application of a force of one newton is displaced a distance of one metre in the direction of the force (J = N m). The unit is named after the British scientist James Prescott Joule (1818-1889).
Joule-Thomson coefficient
	Joule-Thomson coefficient (μ) is a parameter which describes the temperature change when a gas expands adiabatically through a nozzle from a high pressure to a low pressure region. It is defined by where H is enthalpy.

 

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