Second-order transition(2) S.J.T.U. Phase Transformation and Applications ds-d-o dp ds=dSB dS-dS-0-CCd-Wus-L.cdp" VA=VREV dp △Cp The thermal expansion dTeg VTe9△a coefficient does change! △O dTeg △B SJTU Thermodynamics of Materials Spring 2007 ©X.J.Jin Lecture 8 Chemical equilibriumPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2007 © X. J. Jin Lecture 8 Chemical equilibrium Second-order transition (2) dp TV dT TC Sd p p ⎟⎠⎞ ⎜⎝⎛ ∂∂ −= A B = SdSd ( ) eq AABB eq eq ApBp A B dpVVdT T CC SdSd −− αα − ==− ,, 0 = BA =VVV Δα Δ = eq p eq eq TV C dT dp The thermal expansion coefficient does change! β α Δ Δ = eq eq dT dp