Phase Diagrams

Front

What is a phase diagram?

Back

A graphical representation showing the phases of a substance at different temperatures and pressures.

Front

What does the triple point represent in a phase diagram?

Back

The condition at which solid, liquid, and gas phases coexist in equilibrium.

Front

What is the critical point in a phase diagram?

Back

The temperature and pressure at which the liquid and gas phases become indistinguishable.

Front

Define melting point.

Back

The temperature at which a solid becomes a liquid at a given pressure.

Front

Define boiling point.

Back

The temperature at which a liquid becomes a gas at a given pressure.

Front

What is normal boiling point?

Back

The boiling point of a substance at standard atmospheric pressure (1 atm).

Front

What phase is a substance in at temperatures below its melting point?

Back

Solid.

Front

What phase is a substance in at temperatures above its boiling point?

Back

Gas.

Front

What happens to the phases of a substance as temperature increases?

Back

Generally, solids melt to liquids, and liquids vaporize to gases.

Front

What is the significance of the line separating phases in a phase diagram?

Back

It indicates the conditions under which two phases can coexist.