Front

What is a phase diagram?

Back

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

Front

What is the triple point?

Back

The unique set of conditions at which all three phases (solid, liquid, gas) of a substance 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 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 process where a solid turns into a liquid when heat is applied.

Front

What is boiling?

Back

The process where a liquid turns into a gas when it reaches its boiling point.

Front

What is the normal melting point?

Back

The temperature at which a substance changes from solid to liquid at 1 ATM pressure.

Front

What is a supercritical fluid?

Back

A state of matter that occurs when a substance is above its critical temperature and pressure, exhibiting properties of both liquid and gas.

Front

What happens to a substance at point B in a phase diagram?

Back

Above point B, the substance exists as a supercritical fluid.

Front

What is equilibrium in the context of phase diagrams?

Back

A state where the rates of the forward and reverse phase changes are equal, resulting in no net change in the amount of each phase.