RE Krieger Publishing Company.13 James Clerk Maxwell in his 1871 Theory of Heat outlines four stipulations for the definition of heat: It is something which may be transferred from one body to another, according to the second law of thermodynamics.Speculation on thermal energy or "heat" as a separate form of matter has a long history, see caloric theory, phlogiston and fire (classical element).
It cannot be treated as a material substance, because it may be transformed into something that is not a material substance,.g., mechanical work.Associated with this differential equation is that the internal energy may be considered to be a function U ( S, V ) of its natural variables S and.
We need salt against the heat.Every time you press the brake pedal you are turning your money into heat, pointless heat.Equilibrium Thermodynamics, (1st edition 1968 third edition 1983, Cambridge University Press, Cambridge UK, isbn.
Freeman, San Francisco, isbn.The Tragicomical History of Thermodynamics, Springer, New York, isbn.In general, for homogeneous systems, dUTdSPdV.
Rational Thermodynamics: a Course of Lectures on Selected Topics, McGraw-Hill Book Company, New York.25 It is sometimes also called the heat function.It is a measurable quantity, and so can be treated mathematically.