Lecture Notes for CHEM 3410 - PHYSICAL CHEMISTRY I at The Richard Stockton College of New Jersey (StoCo)

Notes Information

Material Type:Class Note
University:The Richard Stockton College of New Jersey
Term:Fall 2008
  • Molar Entropy
  • Similar Argument
  • Natural Sciences
  • Phase Equilibrium
  • Large Number
  • Temperature
  • Molar Volume
  • Phase Diagram
  • Triple Point
  • Free Energy
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The Richard Stockton College of New Jersey Chemistry Program, School of Natural Sciences and Mathematics PO Box 195, Pomoma, NJ CHEM 3410: Physical Chemistry I | Fall 2008 October 17, 2008 Lecture 20: Phase equilibrium References 1. Levine, Physical Chemistry, Sections 7.1{7.3 Key Concepts At equilibrium, the free energy is minimized. Therefore, the phase with the lowest chemical potential will be stable. For a single component system, = Gn = G. The key question is how depends on T and P. We can nd this dependence by writing d (dG for a single component system) out in two di erent ways: dG = d = SdT +VdP d = @ @T P dT + @ @P T dP which gives us: @ @T P = S and @ @P T = V We can now see how varies with T and P by comparing the molar entropy and volume of di erent phases. The molar entropy of a gas phase is much greater than the molar entropy of a solid or liquid phase. This is due to the large number of di erent ways to arrange molecules in th...

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