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Ch05-A-physical equilibria

# Ch05-A-physical equilibria - CHM 341 Elementary Physical...

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Chapter 5: A: Stability, Variation of Gibbs energy CHM 341 Elementary Physical Chemistry Fall 2009 Ranko Richert

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general strategy for state function z ( x , y ) () { { y x z x y z y x z y z x x y x Q x y z x z y y y x P x y x Q y y x P dy y x Q dx y x P dz dy y z dx x z dz y x f z y x Q y x P = = = = = = + = + = = 2 2 2 2 , , , , : because , , , , , , ( ) x y x Q y y x P dy y x Q dx y x P dz dz z dy y z dx x z dz y x z y x z z y x f z f i i i f f = + = = = + = = = , , whenever exact is , , 0 dz ) 5 t independen path is ) 4 exact is ) 3 , , ) 2 exists , ) 1 loop closed λ the following statements are equivalent
internal energy: reversible change, closed system, only expansion work () V S S V p S T V rev rev S p V T S p S V U V S U V T p V U T S U dV V U dS S U dU U pdV TdS dU TdS dq pdV dw dw dq dU = = = = = =

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Ch05-A-physical equilibria - CHM 341 Elementary Physical...

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