When glucose monomers are joined together by glycosidic linkages to form a cellulose polymer, the changes in free energy, total energy, and entropy are as follows:
A) +ΔG, +ΔH, +ΔS.
B) +ΔG, +ΔH, -ΔS.
C) +ΔG, -ΔH, -ΔS.
D) -ΔG, +ΔH, +ΔS.
E) -ΔG, -ΔH, -ΔS.

Question

Quizplus · Accepted Answer

The formation of a glycosidic linkage between glucose monomers (condensation reaction) requires input of energy and thus has a positive ΔH. The overall process of polymerization of glucose monomers into a cellulose polymer also results in an increase in order (decrease in entropy), thus has a negative ΔS. The overall change in free energy (ΔG) is positive because the process is not spontaneous and requires an input of energy. Therefore, the best choice is B (+ΔG, +ΔH, -ΔS).

When Glucose Monomers Are Joined Together by Glycosidic Linkages to Form