Thermodynamics MOC

Phase change

Phase changes occur when Quantitative growth gives way to a qualitative leap. The various phase changes are shown below

graph LR;
	S[Solid]
	L[Liquid]
	G[Gas]
	S==>|Melting|L
	L==>|Freezing|S
	L==>|Vaporisation|G
	G<==>|Condensation|L
	S-->|Sublimation|G
	G-->|Deposition|S

Phase changes occur at specific combinations of Temperature and Pressure, which can be shown in phase diagrams. The energy required to complete a phase change for a given mass, at a given temperature and pressure, is the Heat of transformation.

Diagrams

For and , the distinction between liquid and gas break down, giving way to a Supercritical fluid.

Water is a strange case, increasing pressure on a solid changes it to a liquid.

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