ThermoPracticeProblems - BIOC 460, Spring 2009 page 1...

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Unformatted text preview: BIOC 460, Spring 2009 page 1 Thermodynamics Practice Problems NOTE : R (the gas constant) = 8.315 x 10 3 kJ mol 1 K 1 The values of R will always be on exam cover sheets. My problems will be in kJ /mol. Assume that T = 298 K unless otherwise stated . Always show your work . On exams, you must at a minimum show the starting equation and indicate what you "plugged in" to that equation to get your answer. Remember to state UNITS of answers -- units are important ! 1. Calculation of G' from K eq ': Fructose 1,6-bisphosphate (F-1,6-BP) DHAP + GAP K eq = 6.74 x 10 5 M at 37 C. (Note that units of K eq ' depend on the specific reaction . Equilibrium mass action ratio for this reaction is {[DHAP][GAP]/[F-1,6-BP]} eq , so units are MM/M = M ; however, units disappear when you take the natural log of the number, and units of G' end up being determined by units of RT.) Calculate G'. 2. Calculation of K eq from G': Glucose 1-phosphate Glucose 6-phosphate G' = 7.6 kJ/mol Calculate K eq ' at 25 C ....
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This note was uploaded on 01/30/2010 for the course BIOC 460 taught by Professor Ziegler during the Spring '07 term at University of Arizona- Tucson.

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ThermoPracticeProblems - BIOC 460, Spring 2009 page 1...

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