Entropy Change (ΔS)

Definition

Entropy change, represented by the symbol ΔS, is a measure of the dispersal or randomness of particles in a system. It quantifies the degree of disorder or randomness in a chemical reaction.

Related terms

Gases:

Gases have higher entropy compared to liquids and solids because their particles are more dispersed and have greater freedom of movement.

Phase Changes:

Phase changes such as melting or vaporization usually result in an increase in entropy due to increased particle movement and disorder.

Number of Particles: Increasing the number of particles involved in a reaction often leads to an increase in entropy since there will be more possible arrangements for those particles.