Final answer:
During the formation of sucrose from glucose and fructose, energy is released as a glycosidic bond is formed in a dehydration reaction. While the hydrolysis of sucrose into glucose and fructose follows first-order kinetics, the reverse reaction is thought to release a slightly lesser amount of energy than the combustion of glucose, which is 2803 kJ per mole.
Step-by-step explanation:
The energy released during the formation of sucrose from glucose and fructose is part of a dehydration reaction where a glycosidic bond is formed and a water molecule is lost. The reaction for the hydrolysis of sucrose, which is the reverse of this process, is C₁₂H₂₂O₁₁ + H₂O → C₆H₁₂O₆ (glucose) + C₆H₁₂O₆ (fructose),
This follows a first-order rate law. The energy released when one mole of glucose is combusted (which is similar to the disposal of glucose in living systems) is 2803 kJ. Since sucrose is a disaccharide of glucose and fructose when these monosaccharides combine to form sucrose, a slightly lesser amount of energy is expected to be released due to the formation of the glycosidic bond.