Phase Diagrams FLASHCARD

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 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 a substance can no longer exist as a liquid and gas phases become indistinguishable.

Front

What phase change occurs during melting?

Back

The transition from solid to liquid as a substance absorbs heat.

Front

What phase change occurs during freezing?

Back

The transition from liquid to solid as a substance releases heat.

Front

What is evaporation?

Back

The process by which molecules escape from the liquid phase to the gas phase at temperatures below the boiling point.

Front

What is condensation?

Back

The process by which gas molecules lose energy and transition into the liquid phase.

Front

What does it mean when a phase change is exothermic?

Back

It means that the process releases heat to the surroundings.

Front

What does it mean when a phase change is endothermic?

Back

It means that the process absorbs heat from the surroundings.

Front

What happens to temperature during a phase change?

Back

The temperature remains constant while a substance is undergoing a phase change.