May 2011
Beginner
492 pages
14h 16m
English
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8.3 Specific Heats and Latent Heats
As already stated, thermodynamics deals with the transformation of heat energy into mechanical work and vice versa. By the application of heat, to a body, the thermodynamic state of the body changes and therewith the thermodynamic co-ordinates defining the state also change. Let dp, dv and dθ be the infinitesimally small changes in pressure, volume and temperature of the body as a result of absorption of small quantity of heat dQ. Then from change of any two of these co-ordinates, the quantity of heat absorbed dQ can be calculated. The change in the remaining thermodynamic co-ordinates can be obtained from the changes of the two co-ordinates with the help of the equation of state.
Thus,
dQ = k dθ + ℓ dv
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