Phase Diagrams

Front

What is a phase diagram?

Back

A graphical representation showing the states of matter (solid, liquid, gas) of a substance at different temperatures and pressures.

Front

What does the line between solid and liquid represent in a phase diagram?

Back

The melting/freezing point of the substance.

Front

What does the line between liquid and gas represent in a phase diagram?

Back

The boiling/condensation point of the substance.

Front

What is sublimation?

Back

The process where a solid changes directly into a gas without passing through the liquid phase.

Front

What is deposition?

Back

The process where a gas changes directly into a solid without passing through the liquid phase.

Front

What is the triple point in a phase diagram?

Back

The unique set of conditions at which all three phases (solid, liquid, gas) 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

What happens to the state of matter when temperature increases?

Back

Generally, increasing temperature can cause a substance to transition from solid to liquid (melting) or from liquid to gas (boiling).

Front

What happens to the state of matter when pressure increases?

Back

Increasing pressure can cause a substance to transition from gas to liquid (condensation) or from liquid to solid (freezing).

Front

What is the normal boiling point?

Back

The temperature at which a liquid's vapor pressure equals the external pressure, typically measured at 1 atm.