?

AP® Chemistry

Free Version

Upgrade subject to access all content

Difficult

Endergonic and Exergonic

APCHEM-EG7LQJ

Exergonic reactions have $ΔG < 0$, and endergonic reactions have $ΔG > 0$. Many biological reactions are endergonic, and yet they still occur and keep us alive.

Which of the following explains how this is possible?

A

Endergonic reactions in the body are exothermic, producing enough heat to shift the reaction to the products, making it spontaneous.

B

The equilibrium constant for endergonic reactions is really low, helping make the reactions spontaneous.

C

Endergonic reactions in the body have a very low entropy, helping drive these reactions spontaneously.

D

The endergonic reaction is coupled with an exergonic reaction, like ATP decomposition, to produce enough outside energy to occur.