13.4-Changes of State - 2

A ____ gives the conditions of temperature and pressure at which a substance exists as solid, liquid, or gas.

• Graph

• Chart

• Phase diagram

• Table

The conditions of pressure and temperature at which two phases exist in equilibrium are indicated on a phase diagram by a ____.

• Curve

• Line

• Region

• Point

The ____ describes the only set of conditions at which all three phases can exist in equilibrium with one another.

• Boiling point

• Critical point

• Triple point

• Equilibrium line

The triple point of water is at a temperature of ____.

• 0.016°C

• 0.1°C

• 1°C

• -0.5°C

The triple point of water is at a pressure of ____.

• 1.00 kPa

• 0.50 kPa

• 0.61 kPa

• 1.61 kPa

A decrease in pressure lowers the ____ and raises the melting point.

• Freezing point

• Boiling point

• Sublimation point

• Triple point

Below the triple point, the vapor and liquid cannot exist in ____.

• Coexistence

• Gas phase

• Equilibrium

• Liquid form

Increasing the pressure won't change the vapor to a liquid; instead, the vapor behaves more like a ____.

• Liquid

• Solid

• Plasma

• Supercooled gas

Recent research shows that the surface of ice has a ____ layer that exists well below ice's melting point.

• Sticky

• Slippery

• Hard

• Dry

The liquid-like surface layer on ice provides the ____ needed for smooth skating and skiing.

• Lubrication

• Friction

• Resistance

• Adhesion