Regular solution 1 S.J.T.U. Phase Transformation and Applications Page 15/30 Mixtures of A and B,with the overall 4500 composition falling between xB1 and xB2 can 4000 0=17.000J/mol 3500 minimize their molar Gibbs free energies by 3000 forming two solutions of composition xB1 and 2500 xB2.(i.e.,becoming partially immiscible) 2000 1500 1000 500 Non-ideal 0.25 0.5 0.75 阳→ (a) 0 =0 100 T=800K,0=17,000Jmol 200 GM=HM=QXXB -300 (ow/r) 400 -500 -500 G-G -700 M -800 B.1 0.25 0.5 0.75 (b) Figure 9.13 Plots of properties of mixing versus composition for regular solutions: (a)molar enthalpy and(b)molar Gibbs free energy. SJTU Thermodynamics of Materials Spring 2007 ©X.J.Jin Lecture 16 Phase Diagram llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2007 © X. J. Jin Lecture 16 Phase Diagram II Page 15/30 Mixtures of A and B, with the overall composition falling between xB1 and xB2 can minimize their molar Gibbs free energies by forming two solutions of composition xB1 and xB2. (i. e., becoming partially immiscible) Regular solution 1 BA xs M xs M == ω xxHG M = 0 xs S ideal xs M M M += GGG Non-ideal !