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'''Enthalpy''' is a concept used in science and engineering when [[heat]] and [[work]] need to be calculated. |
'''Enthalpy''' is a concept used in science and engineering when [[heat]] and [[Work (physics)|work]] need to be calculated. |
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In the study of heat, both in [[engineering]] and [[chemistry]], enthalpy (written as ''H'') is a useful measure that scientists have developed to find out how much work has been done, or heat absorbed, when a [[gas]] changes its size at a constant [[pressure]]. |
In the study of heat, both in [[engineering]] and [[chemistry]], enthalpy (written as ''H'') is a useful measure that scientists have developed to find out how much work has been done, or heat absorbed, when a [[gas]] changes its size at a constant [[pressure]]. |
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Revision as of 18:06, 2 April 2012
Enthalpy is a concept used in science and engineering when heat and work need to be calculated.
In the study of heat, both in engineering and chemistry, enthalpy (written as H) is a useful measure that scientists have developed to find out how much work has been done, or heat absorbed, when a gas changes its size at a constant pressure.
The name comes from the Greek word "enthalpos" (ενθαλπος), meaning "to put heat into". The idea and the word was made up by the Dutch scientist Heike Kamerlingh Onnes in 1909.
