Phase Diagrams

Front

What is a phase diagram?

Back

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

Front

What does the triple point on a phase diagram represent?

Back

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

Front

What state of matter is represented in the gas region of a phase diagram?

Back

Gas is the state of matter where particles are far apart and move freely.

Front

What state of matter is represented in the liquid region of a phase diagram?

Back

Liquid is the state of matter where particles are close together but can flow past one another.

Front

What state of matter is represented in the solid region of a phase diagram?

Back

Solid is the state of matter where particles are tightly packed and vibrate in place.

Front

How does pressure affect the state of a substance according to phase diagrams?

Back

Increasing pressure can change a substance from gas to liquid or from liquid to solid.

Front

How does temperature affect the state of a substance according to phase diagrams?

Back

Increasing temperature can change a substance from solid to liquid (melting) or from liquid to gas (vaporization).

Front

What happens at the critical point on a phase diagram?

Back

At the critical point, the distinction between liquid and gas phases disappears, resulting in a supercritical fluid.

Front

What is the significance of the lines on a phase diagram?

Back

The lines represent the conditions (temperature and pressure) at which two phases coexist in equilibrium.

Front

What does it mean if a substance is below the triple point on a phase diagram?

Back

The substance cannot exist as a liquid; it will be either solid or gas.