The human body processes ethanol by oxidizing it to acetaldehyde via the NAD ox/ NAD red dehydrogenase

Question:

The human body processes ethanol by oxidizing it to acetaldehyde via the NAD_ox/NAD_red dehydrogenase redox reaction. The reaction is

The values for properties in the order the species appear in the reaction are C AG'O f, 310.15(pH =7.4, 1=0.25) ={1163.9, 91.45, 1231.0, 43.2}kJ/mol ,, 310.15(pH =7.4, I=0.25) ={-11.9,

(a) Determine the magnitude of the heat of reaction under the stated conditions.

(b) Calculate the equilibrium constant. If we assume the ratio of the two forms of NAD are near unity, what is implied about the ratio of acetaldehyde:ethanol? What is the importance of sign of the Gibbs energy for the subsequent oxidation of acetaldehyde to acetic acid?

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