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
University:The Richard Stockton College of New Jersey
Term:Fall 2008
  • Natural Sciences
  • Potential Function
  • Interactions
  • Introduction
  • Free Energy
  • Composition
  • Mathematics
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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 8, 2008 Lecture 16: Chemical Reactions References 1. Levine, Physical Chemistry, Sections 4.6{4.8, 6.1{6.2 Key Concepts Based on our expression for the chemical potential of an ideal gas in a mixture, we were able to arrive at an expression for the free energy of mixing of ideal gases. In general for a system of i gases and then for a two-compoennt system (A & B) we wrote: Gmix = RT X Xi lnXi Gmix = RT(XA lnXA +XB lnXB) We can nd the entropy of mixing since S = @G@T P: Smix = @ G mix @T P = R X Xi lnXi So the entropy of mixing of ideal gases is always positive, which is expected. In general, for any other phase we will write the chemical potential as a function of T, P, and compo- sition through the introduction of the activity, ai: i = i +RT lnai We do this because we would like apply...

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