The first step in the metabolism of ethanol is dehydrogenation by reaction with nicotinamide-adenine dinucleotide (NAD):
                                                     C₂H₅OH +  NAD⁺  →  C₂H₄O + NADH
What is the heat effect of this reaction upon metabolizing 10 g of ethanol from a typical cocktail? What is the total heat effect for complete metabolism of the 10 g of ethanol to CO₂ and water? How, if at all, is the perception of warmth that accompanies ethanol consumption related to these heat effects? For computing heat effects, you may neglect the temperature, pH, and ionic strength dependence of the enthalpy of reaction (i.e. apply the enthalpies of formation from Table C.5 of App. C at physiological conditions).

Table C.5 of App. C

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Table C.5: Standard Enthalpies and Gibbs Energies of Formation at 298.15 K for Substances in Dilute Aqueous Solution at Zero Ionic Strength Joules per mole of the substance formed Chemical species AH 298 Acetaldehyde Acetate C,H40 -212.2 -139.0 -486.0 -369.3 Acetic acid CH3O2 -485.8 -396.5 Acetone C3H60 -221.7 -159.7 C10H13N5O4 C10H14N50 C10H12N50 10P C10H13N30 10P, C10H14N50 10P7 C10H12N5O10P2- C10H13N5O10P- C10H14NSO7P C10H12N3013P C10H13N5013P C10H14N5O13P Adenosine -621.3 -194.5 Adenosine cation -637.7 -214.3 Adenosine 5' diphosphate (ADP) -2626.5 -1906.1 -2620.9 -1947.1 -2638.5 -1972.0 Adenosine 5' monophosphate (AMP) -1635.4 -1040.5 -1630.0 -1078.9 -1648.1 -1101.6 Adenosine 5' triphosphate (ATP) -3619.2 -2768.1 -3612.9 -2811.5 -3627.9 -2838.2 Alanine C;H;NO, -554.8 -371.0 Ammonia NH3 -80.3 -26.5 NH C3H1,05 Ammonium -132.5 -79.3 D-arabinose -1043.8 -742.2 -525.9 L-asparagine L-aspartate C,H&N2O3 -766.1 C,H;NO, C6H30; -943.4 -695.9 Citrate -1515.1 -1162.7 -1518.5 -1199.2 CH-0, -1520.9 -1226.3 Carbon dioxide CO2 -413.8 -386.0 co,? -527.8 Carbonate -677.1 CHO, CH2O3 Bicarbonate -692.0 -586.8 Carbonic acid -694.9 -606.3