Difference between revisions of "Specific Heat"
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increment of heat per unit mass and ''dT ''is the infinitesimal increment | increment of heat per unit mass and ''dT ''is the infinitesimal increment | ||
of temperature. | of temperature. | ||
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| + | ''For gases the thermodynamic process must be specified; two specific | ||
heats are defined, one being the specific heat in a constant-pressure process | heats are defined, one being the specific heat in a constant-pressure process | ||
<center>c<sub>p</sub> = (dQ / dT)<sub>p</sub></center>and the other, the specific heat in a | <center>c<sub>p</sub> = (dQ / dT)<sub>p</sub></center>and the other, the specific heat in a | ||
Latest revision as of 11:28, 5 August 2007
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Specific Heat
The ratio of the heat absorbed (or released) by unit mass of a system to the corresponding temperature rise (or fall). If this ratio varies with temperature, it must be defined as a differential quotient dQ/dT, where dQ is the infinitesimal increment of heat per unit mass and dT is the infinitesimal increment of temperature.
For gases the thermodynamic process must be specified; two specific heats are defined, one being the specific heat in a constant-pressure process
In a perfect gas these are, by definition, constants with respect to temperature, and the difference of the specific heat at constant pressure and the specific heat at constant volume is equal to the
gas constant:References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
