A phase diagram partitions a space of thermodynamic variables into regions occupied by different equilibrium phases and records the coexistence curves between them.
The liquidus is the locus in a phase diagram above which the equilibrium state is entirely liquid. In a dilute binary solution it is often approximated locally by a linear relation such as .
Freezing-point depression is the lowering of a solvent's equilibrium freezing temperature by dissolved solute. In the linear dilute approximation, with .
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A phase diagram is a graphical representation that shows the phases of a substance (solid, liquid, gas) as a function of temperature and pressure. It illustrates the conditions under which distinct phases occur and coexist in thermodynamic equilibrium. Key features of a typical phase diagram include: 1. **Axes**: The horizontal axis usually represents temperature, while the vertical axis represents pressure. 2. **Phase Regions**: Different areas or regions on the diagram represent different states of matter.
