Lecture_20_2011_Nov2 - will be equal. Chemical potential...

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Introduction to Biophysics Lecture 20 Chemical Reactions
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Motivation: While concentration gradient can be a source of Free Energy in leaving systems, the most important energy storage mechanism involves energy storage in the form of chemical energy .
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Chemical potential – measures the availability of a particular molecular species E n i – can be number of molecules than μ i has units of energy [J] n i – can be number of moles than μ i has units of energy/mole [J/mole]
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Equilibrium condition for the case when two macroscopic systems exchange both energy and particles: T a = T b μ a,i = μ b,i In chemical equilibrium, chemical potentials for each species in two systems
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Unformatted text preview: will be equal. Chemical potential can be found if concentration of molecules is known and its standard chemical potential ( ) = (T)+k B Tln(C/C ) = (T)+k B Tln(a), a activity a = f*C , f coefficient of activity (accounts for interaction between particles in solution) G gives a universal criterion for the direction of a chemical reaction With dp = 0 and dT = 0 G= (products) - (starting compounds) Homework: Finish Example on page 303 Nelson problem 8.2, page 337 Suggested reading: Nelson 8.1, 8.2...
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This note was uploaded on 12/09/2011 for the course PHYS 570 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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Lecture_20_2011_Nov2 - will be equal. Chemical potential...

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