What is the primary function of both alcohol fermentation and lactic acid fermentation?

Oxidize NADH to NAD+

Explanation:

Fermentation is of two types alcoholic fermentation and lactic acid fermentation both occurs without oxygen. In alcoholic fermentation, glucose is first converted into two pyruvic acid molecule and pyruvic acid is then converted into lactic acid by oxidizing NADH to NAD+.

In lactic acid fermentation glucose is first break into 2 pyruvic and than this pyruvic acid is converted into lactic acid by oxidizing 2 NADH molecules into NAD+. Therefore the correct answer is to oxidize NADH to NAD+.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.