Phase Diagram

Front

What is a phase diagram?

Back

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

Front

What are the three main phases of matter?

Back

Solid, liquid, and gas.

Front

What is the triple point?

Back

The condition at which all three phases (solid, liquid, gas) coexist in equilibrium.

Front

What is the critical point?

Back

The temperature and pressure at which a substance can no longer exist as a liquid and gas phases become indistinguishable.

Front

What happens to water at 0 °C and 1 atm pressure?

Back

It can exist as both solid (ice) and liquid (water) in equilibrium.

Front

Define sublimation.

Back

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

Front

Define deposition.

Back

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

Front

What is the normal boiling point of a substance?

Back

The temperature at which a substance transitions from liquid to gas at 1 atm pressure.

Front

What is the significance of the melting point?

Back

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

Front

How does pressure affect the phase of a substance?

Back

Increasing pressure can change the phase of a substance, often from gas to liquid or liquid to solid.