Exergonic reactions

Definition

Exergonic reactions are chemical reactions that release energy by breaking down complex molecules into simpler ones. These reactions have a negative change in free energy and occur spontaneously under standard conditions.

5 Must Know Facts For Your Next Test

1. Exergonic reactions release energy, often in the form of heat or light.
2. They are characterized by a negative ΔG (change in Gibbs free energy).
3. Cellular respiration is a prime example of an exergonic reaction.
4. Exergonic reactions help drive endergonic reactions through energy coupling.
5. These reactions are essential for maintaining the metabolic balance within cells.

Review Questions

• What type of reaction releases energy and has a negative change in Gibbs free energy?
• Give an example of an exergonic reaction that occurs within cells.
• Why are exergonic reactions important for cellular metabolism?

Related terms

Endergonic Reactions: Chemical reactions that absorb energy and have a positive change in free energy.

ATP (Adenosine Triphosphate): The primary energy carrier in cells, often produced through exergonic processes.

Gibbs Free Energy: A thermodynamic quantity representing the amount of useful work obtainable from a system at constant temperature and pressure.