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

Notes Information

Material Type:Class Note
Professor:Richard
Class:CHEM 3410 - PHYSICAL CHEMISTRY I
Subject:Chemistry
University:The Richard Stockton College of New Jersey
Term:Fall 2008
Keywords:
  • Natural Sciences
  • Complicated
  • Miscibility
  • Either...or
  • High Temperatures
  • Temperature
  • Transitions
  • In/on/at a Place
  • Free Energy
  • Interactions
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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 31, 2008 Lecture 25: Regular solutions & eutectic phase diagrams References 1. Levine, Physical Chemistry, Sections 12.1, 12.5{12.9 Key Concepts In a solution with repulsive interactions between the components, we observe a competition between the entropy of mixing (which usually favors mixing) and the enthalpy of mixing (which in this case are repulsive and favor separation). Gmix = Hmix T Smix At high temperatures, entropy dominates while at lower temperature the enthalpic contribution be- comes more signi cant. If the interactions between A & B are repulsive, that is, A and B don't like to be together then you get phase separation or imiscible phases. (Think: ouzo and water) 1. If you start with pure A at some temperature T and begin to add B, initially the B will go into solution and there will be a single ...

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