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Cellular Respiration

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Determining if a physical or chemical process is thermodynamically favored depends on the enthalpy and entropy of a system, which in turn leads to estimation or calculation of free energy.

In cellular respiration, carbohydrates are broken down into carbon dioxide and water while producing a net of 34 ATP. ATP is used to measure the energy of a biological system.

Which of the following statements MOST accurately supports cellular respiration?

A

Cellular respiration is very exothermic but has a decrease in entropy, making the system only slightly thermodynamically favored.

B

The entropy of the system increases due to a greater number of molecules formed during the reaction, making entropy the only factor that favors the process.

C

The large value of ATP shows a large amount of energy is required to drive the system forward, which is readily available in cells, making the process thermodynamically favored.

D

Cellular respiration is driven by both an increase in entropy and a large decrease in enthalpy, resulting in a thermodynamically favored system.