Physical Science Chapter 3

A gas has

• a definite volume but no definite shape.
• a definite shape but no definite volume.
• no definite shape or definite volume.
• a definite volume and a definite shape

Matter that has a definite volume but no definite shape is a

• liquid
• solid
• gas
• plasma

In which of the substances in the picture are the forces of attraction among the particles so weak that they can be ignored under ordinary conditions?

• substance A
• substance B
• substance C
• all of the above

What is the result of a force distributed over an area?

• temperature
• volume
• pressure
• mass

Collisions of helium atoms with the walls of a closed container cause

• condensation
• gas pressure
• a decrease in volume
• an overall loss of energy

Which of the following factors affects the pressure of an enclosed gas?

• temperature
• volume
• number of particles
• all of the above

The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will

• increase
• decrease
• remain constant
• cause a decrease in the average kinetic energy of the particles

The law that states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is

• Boyle's Law
• Bose's Law
• Einstein's Law
• Charles' Law

Boyle's Law states that the volume of a gas is inversely proportional to its pressure if the

• temperature and number of particles are constant.
• temperature reaches absolute zero.
• number of particles decreases
• temperature and number of particles are doubled.

The phase change that is the reverse of condensation is

• freezing
• melting
• vaporization
• sublimation