《物理化学 Physical Chemistry》课程教学资源（英文版）The Second Law（The Machinery）

Th e second law The machinery

The Second Law The Machinery

The Fundamental equations du= tds-pdV dh= tds+ vdp da=-SdT-pdV dg=-sdt+ vdp

The Fundamental Equations • dU = TdS - pdV • dH = TdS + Vdp • dA = -SdT - pdV • dG = -SdT + Vdp

Maxwell relations- Derivation oUOU IS+ dv=-lds+ pdv C S aT C

Maxwell Relations - Derivation               2 2 U S V U V S dU U S dS U V dV TdS pdV T V p S V S S V       =       =       +       = − +        = −      

Maxwell Relations- Summary T OS T OS Os T T S T p

Maxwell Relations - Summary p T V T S p S V p S T V V S T p S V p T S p V T         = −                 =                 =                 = −                        

Thermodynamic eg'n. of state dU=丌nV+CaT

Thermodynamic Eq’n. of State        T T T V T V U V T p T p dU dV C dT        =       − = +