Thermodynamically Unfavorable Reactions

Definition

These are chemical reactions that do not occur spontaneously because they require an input of energy to proceed. They have a positive change in Gibbs free energy.

Analogy

Think of these reactions like trying to roll a ball uphill. Without some sort of push or external force, the ball won't make it up the hill on its own. Similarly, thermodynamically unfavorable reactions need an extra "push" of energy to get them going.

Related terms

Endothermic Reaction: A reaction that absorbs heat from its surroundings. It's like a sponge soaking up water.

Gibbs Free Energy: The maximum amount of work a system can perform at constant temperature and pressure without any outside intervention.

Activation Energy: The minimum amount of energy required for a chemical reaction to occur, similar to the initial push needed to start rolling the ball uphill.