Second law of thermodynamics: Difference between revisions

Revision as of 18:27, 23 February 2007

For a reversible change

\left.dQ\right.=TdS

Thus for a closed system ( $n$ fixed):

\left.dU\right.=TdS-PdV

For an open system:

\left.dU\right.=TdS-PdV+\mu dN

For $U(S,V)$ one has the following total differential

dU=\left({\frac {\partial U}{\partial S}}\right)_{V}dS+\left({\frac {\partial U}{\partial V}}\right)_{S}dV

Revision as of 19:05, 22 February 2007 (edit) Carl McBride (talk \| contribs) mNo edit summary ← Older edit		Revision as of 18:27, 23 February 2007 (edit) (undo) Carl McBride (talk \| contribs) mNo edit summary Newer edit →
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	:<math>dU=\left(\frac{\partial U}{\partial S}\right)_V dS + \left(\frac{\partial U}{\partial V}\right)_S dV</math>		:<math>dU=\left(\frac{\partial U}{\partial S}\right)_V dS + \left(\frac{\partial U}{\partial V}\right)_S dV</math>

			[[Category: Classical thermodynamics]]