Quiz #3-1 PRACTICE: States of Matter
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One significant difference between gases and liquids is that:
a gas is made up of molecules, a liquid is not
a gas is always a mixture, a liquid is not
a gas assumes the shape of its container, a liquid does not
a gas assumes the volume of its container, a liquid does not
a gas may consist of both elements and compounds, a liquid may not
Which of the following statements about gases is FALSE?
Gases expand spontaneously to fill the container they are placed in.
Distances between molecules of gas are very large compared to bond distances within molecules.
Gases are highly compressible.
Non-reacting gas mixtures are homogeneous.
All gases are colorless and odorless at room temperature.
exist only at very low temperatures
are usually very soft
have highly ordered structures
have their particles arranged randomly
exist only at high temperatures
In liquids, the attractive intermolecular forces are:
strong enough to hold molecules relatively far away from each other
not strong enough to keep molecules from moving past each other
strong enough to keep the molecules confined to vibrating about their fixed lattice points
not strong enough to hold molecules close together
very weak compared with kinetic energies of the molecules
Matter changing from being a liquid to a gas is referred to as:
The freezing point of a substance is the same as:
the critical point
the vapor-pressure curve
the boiling point
the melting point
the triple point
In the physical change of state lab, we observed freezing of lauric acid. During the freezing process, the temperature:
jumps about randomly
cannot be determined
As a solid element melts, which of the following best describes the behavior of atoms?
the atoms move closer together and they have less attraction for one another
the atoms spread out and they have less attraction for one another
the atoms become larger and they have greater attraction for one another
the atoms spread out and they have more attraction for one another
the atoms move closer together and they have more attraction for one another
Which is NOT a correct assumption related to the Kinetic Theory?
a gas is composed of particles relatively far apart from one another
no attractive or repulsive forces exist between the particles
intermolecular forces influence the properties a gas
particles in a gas move in random motion
collisions are perfectly elastic
Imagine that a milk jug is filled with hot water, emptied, sealed and then placed in an ice bath. The closed container will decrease in volume as the hot water and trapped water vapor are cooled. What best explains this?
the heat from the jug melts the ice
the particles gained kinetic energy
the cold applied to the jug condenses the water
the jug was melted when the hot water was put inside
there are fewer collisions of particles
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