Heat: Difference between revisions
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:<math>\delta Q= TdS</math> | :<math>\delta Q= TdS</math> | ||
where ''T'' is the [[temperature]] and ''S'' is the [[entropy]]. | where ''T'' is the [[temperature]] and ''S'' is the [[entropy]]. <math>\delta</math> represents an [http://mathworld.wolfram.com/InexactDifferential.html inexact differential], indicating that the resulting value depends on the path taken. This equation is an equality when the process is reversible, i.e., the system evolves through a succession of equilibrium states. If the process is irreversible one has | ||
:<math>\delta Q < TdS</math> | |||
==See also== | ==See also== | ||
*[[First law of thermodynamics]] | *[[First law of thermodynamics]] | ||
*[[Second law of thermodynamics]] | |||
*[[Heat flow]] | |||
==References== | ==References== | ||
<references/> | |||
;Related reading | |||
*[http://dx.doi.org/10.1021/ed047p357 Leonard K. Nash "Reversible and irreversible heating and cooling", Journal of Chemical Education '''47''' pp. 357-361 (1970)] | |||
[[category: classical mechanics]] | [[category: classical mechanics]] | ||
[[category: statistical mechanics]] | [[category: statistical mechanics]] | ||
Latest revision as of 10:24, 5 July 2011
The heat, Q is given by
where T is the temperature and S is the entropy. represents an inexact differential, indicating that the resulting value depends on the path taken. This equation is an equality when the process is reversible, i.e., the system evolves through a succession of equilibrium states. If the process is irreversible one has
See also[edit]
References[edit]
- Related reading