AP Chemistry Chapter 13

Substances that can flow are referred to as .................

• fluids.

• solids.

• plasma.

Intermolecular attractions reduce the amount of space between the particles in a liquid. Thus, liquids are much ..................... gases.

• less dense than

• more dense than

• same as

In ............... system, molecules that evaporate can escape from the system.

• an isolated

• a closed

• an open

The conversion of a .............................. is called vaporization.

• liquid to a gas or vapor

• liquid to a solid

• solid to a gas or vapor

During ........................................, only those molecules with a certain minimum kinetic energy can escape from the surface of the liquid.

• freezing

• condensation

• evaporation

An increase in the temperature of a contained liquid .................... the vapor pressure.

• increases

• decreases

• doesn't affect

The vapor pressure of a liquid can be determined with a device called a ..................................

• thermometer

• manometer

• voltmeter

When a liquid is heated to a temperature at which particles throughout the liquid have enough kinetic energy to vaporize, the liquid begins to .............................

• freeze

• melt

• boil

The normal boiling point is defined as the boiling point of a liquid at a pressure of ................

• 101.3 kPa.

• 101.3 Pa.

• 101.3 atm.

The melting point (mp) is the temperature at which a solid changes into a ........................

• gas

• liquid

• plasma