Entropy and Phase Changes

[205873468]

How does entropy affect different phase change equilibriums and conditions that they undergo?

[Maleeha Amir 2E]

If the phase change makes the molecules more disordered (e.g. H2O(l) to H2O (g)), then there is an increase in entropy. If its the opposute, there would be a decrease in entropy.

[906013563]

Entropy, a measure of disorder or randomness in a system, significantly affects the conditions and equilibrium of phase changes. During a phase change, the system undergoes a transformation from one phase to another, such as solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).
1. Melting: increase in entropy favors the melting process: its structure becomes less ordered as it transitions to a liquid state
2. vaporization: causes a significant increase in entropy because the gas phase is much more disordered than the liquid phase
3. freezing: a decrease in entropy since the system becomes more ordered.
4: sublimation: a substantial increase in entropy due to the drastic change in orderliness between the solid and gas phases