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Thermodynamic Energy Equation
The mathematical statement of the concept of conservation
of energy embodied in the first
law of thermodynamics. For reversible processes of a perfect gas, it may
be written in the form pQ = ρcv (dT/dt) - (p/ρ) (dρ) (dt)
where pQ is the rate of energy addition
per unit volume by heating (including the effects of radiation, molecular
conduction, condensation water vapor, and the generation of heat by friction);
T is the Kelvin temperature; cv is the specific heat at constant volume; p
is pressure; and ρ is density. See energy
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use