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Entropy
The amount of disorder in a closed system
How is entropy measured?
Measure of the number of ways that particles can be arranged
and the number of ways that the energy can be shared out between the particles.
Ways to increase the entropy
Dissolution - dissolving a solid - dissolved particles can move freely, no longer being held in one place.
Increasing the number of particles - the more particles you have, the more ways they and their energy can be arranged
Entropy change
.