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The Epic Interactive Encyclopedia 1997
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1992-09-02
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Branch of physics dealing with the
transformation of heat into and from other
forms of energy. It is the basis of the study
of the efficient working of engines, such as
the steam and internal combustion engines.
The three laws of thermodynamics are (1)
energy can be neither created nor destroyed,
heat and mechanical work being mutually
convertible; (2) it is impossible for an
unaided self-acting machine to convey heat
from one body to another at a higher
temperature; and (3) it is impossible by any
procedure, no matter how idealized, to reduce
any system to the absolute zero of
temperature (0K/-273 degrees C) in a finite
number of operations. Put into mathematical
form, these laws have widespread applications
in physics and chemistry.