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?

Back

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

Front

What is the critical point in a phase diagram?

Back

The temperature and pressure at which the distinction between liquid and gas phases disappears.

Front

Define normal boiling point.

Back

The temperature at which a liquid's vapor pressure equals the atmospheric pressure (760 mmHg).

Front

What happens to water at pressures above 760 mmHg?

Back

Water will boil at temperatures above 100 °C.

Front

What is sublimation?

Back

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

Front

What is melting?

Back

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

Front

What is freezing?

Back

The process where a liquid turns into a solid as it loses heat.

Front

What is condensation?

Back

The process where a gas turns into a liquid as it loses heat.

Front

What is the normal melting point?

Back

The temperature at which a solid becomes a liquid at 1 atm pressure.