CHEM 315 ASSIGNMENT 4

CHEM 315 ASSIGNMENT 4 - Chem 3 1 5 Assig nm ent 3 Due 10...

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Chem 315 Assignment 3 Due 10/12 in class 1. The equilibrium constant for the hydrolysis of the dipeptide alanylglycine by a peptidase enzyme is = 8.1 x 10 2 at 310 K. Calculate the standard reaction Gibbs energy for the hydrolysis.(10) 2. The standard Gibbs energy for the hydrolysis of ATP to ADP is -31 kJ mol -1 ; what is the Gibbs energy of reaction in an environment at 37°C in which the ATP, ADP, and P i concentrations are all (a) 1.0 mmol L -1 , (b) 1.0 μmol L -1 ? (10) a) b) 3. The distribution of Na + ions across a typical biological membrane is 10 mmol L -1 inside the cell and 140 mmol L -1 outside the cell. At equilibrium the concentrations are equal. What is the Gibbs energy difference across the membrane at 37°C? The difference in concentration must be sustained by coupling to reactions that have at least that difference of Gibbs energy.(10) 4. For the hydrolysis of ATP at 37°C, ? H o = 20 kJ mol -1 and ? S o = + 34 J K -1 mol -1 . Assuming that these quantities remain constant, estimate the temperature at which the
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This note was uploaded on 02/02/2011 for the course CHEM 315 taught by Professor Evans during the Fall '08 term at New Mexico.

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CHEM 315 ASSIGNMENT 4 - Chem 3 1 5 Assig nm ent 3 Due 10...

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