# Phys Sci Ch 3 Part 1: Question Preview (ID: 16339)

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A gas has
a) a definite volume but no definite shape.
b) a definite volume but no definite shape.
c) no definite shape or definite volume
d) a definite volume and definite shape.

Ninety-nine percent of all the matter that can be observed in the universe exists as
a) gases
b) plasmas
c) liquids
d) solids

Matter that has a definite volume but no definite shape is a
a) liquid
b) solid
c) gas
d) plasma

If you move a substance from one container to another and its volume changes, the substance is a
a) solid
b) liquid
c) gas
d) solution

Forces of attraction limit the motion of particles most in
a) a solid
b) a liquid
c) a gas
d) both b and c

What is the result of a force distributed over an area?
a) temperature
b) volume
c) pressure
d) mass

Collisions of helium atoms with the walls of a closed container cause
a) condensation
b) gas pressure
c) a decrease in volume
d) an overall loss of energy

Which of the following factors affects the pressure of an enclosed gas?
a) temperature
b) volume
c) number of particles
d) all of the above

Raising the temperature of a gas will increase its pressure if the volume of the gas
a) and the number of particles are increased.
b) is increased, but the number of particles is constant.
c) and the number of particles are constant.
d) is constant, but the number of particles is reduced.

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
a) increase
b) decrease
c) remain constant
d) cause a decrease in the average kinetic energy of the particles

Which of the following will cause a decrease in gas pressure in a closed container?
a) lowering the temp
b) reducing the volume
d) both a and b

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
a) Boyle's law
b) Bose's law
c) Einstein's law
d) Charles's law

Boyle’s law states that the volume of a gas is inversely proportional to its pressure if the
a) temperature and number of particles are constant.
b) temperature reaches absolute zero.
c) number of particles decreases.
d) temperature and number of particles are doubled.

What type of change occurs when water changes from a solid to a liquid?
a) a phase change
b) a physical change
c) an irreversable change
d) both a and b

The phase change that is the reverse of condensation is
a) freezing
b) sublimation
c) vaporization
d) melting

During a phase change, the temperature of a substance
a) increases
b) decreases
c) does not change
d) increases or decreases

The phase change that is the reverse of sublimation is
a) condensation
b) melting
c) vaporization
d) deposition

If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted, you know that 80ºC is the
a) freezing point of naphthalene
b) melting point of naphthalene.
c) boiling point of naphthalene.
d) both a and b

The heat of fusion for water is the amount of energy needed for water to
a) freeze
b) boil
c) melt
d) evaporate

During which phase change does the arrangement of water molecules become more orderly?
a) melting
b) freezing
c) boiling
d) condensing

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