Calculate L^∘' for the following reaction: NADH+H^++Pyruvate →NAD^++Lactate

Name: Problem 10, Chapter 20: Biochemistry
Uploaded: 2020-06-25T19:49:36-08:00
Duration: 1 min 48 s
Channel: Sydney Atkins
Description: Calculate L^∘' for the following reaction: NADH+H^++Pyruvate →NAD^++Lactate

step 1 This problem is just like the previous problem. We need to add our half reactions in order to ge

Calculate L^∘' for the following reaction: NADH+H^++Pyruvate...

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Key Concepts

Equilibrium Constant

This concept represents the ratio of the concentrations or activities of the products to reactants at equilibrium. In biochemical reactions, it is often adapted to account for the standard biochemical conditions (usually pH 7) and is directly related to the overall direction and extent of the reaction. Calculating the equilibrium constant involves using the mass?action ratio based on the stoichiometry of the reaction, which in this case includes redox changes.

Standard Gibbs Free Energy Change

This is the change in Gibbs free energy under standard conditions, typically denoted as ?G°'. It provides a quantitative measure of the driving force of the reaction. The relationship ?G°' = ?RT ln K connects the free energy change with the equilibrium constant, allowing one to compute one when the other is known or to predict the spontaneity of the reaction under standard biochemical conditions.

Biochemical Standard States

These refer to the set of conditions used when measuring thermodynamic quantities for biochemical reactions, commonly at a pH of 7.0, 1 M concentration for solutes, and a specified temperature (often 298 K). Adjusting to these conditions from the standard physical-state conditions ensures that the calculated equilibrium constants and free energy changes are relevant for physiological systems.

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