1.
Which term best describes the process by which particles escape from the surface of a nonboiling liquid and enter the gas state?
A
sublimation
B
evaporation
C
surface tension
D
aeration
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Which term best describes the process by which particles escape from the surface of a nonboiling liquid and enter the gas state?
sublimation
evaporation
surface tension
aeration
Which process can be explained by the kinetic-molecular theory?
combustion
oxidation
condensation
displacement reactions
Which is an example of gas diffusion?
inflating a flat tire
the odor of perfume spreading throughout a room
a cylinder of oxygen stored under high pressure
All of the above
Which is an example of effusion?
air slowly escaping from a pinhole in a tire
the aroma of a cooling pie spreading across a room
helium dispersing into a room after a balloon pops
oxygen and gasoline fumes mixing in an automobile carburetor
Which causes the high density of solids?
The particles are more massive than those in liquids.
The intermolecular forces between particles are weak.
The particles are packed closely together.
The energy of the particles is very high.
When you heat a sample of gas, what happens to the particles that make up the gas?
The particles break apart
The particles get smaller
The particles become more dense
The particles move faster
When you heat a sample of a solid, the sample gets a little bigger. This is mainly because:
Heat helps the particles grow
Heating the sample makes it lighter
Heating helps the particles slide past each other
The particles move faster and get a little further apart
When you heat a sample of a solid, the particles that make up the solid:
Loose mass
Move faster
Slow down
Get bigger
When you bring two drops of water near each other and allow them to touch, they combine immediately and become one drop. This is mainly because:
Water molecules are attracted to each other
Water molecules are magnetic
Water is a liquid
Water molecules are made of atoms
When energy as heat is applied to a liquid-vapor system at equilibrium, a new equilibrium state will have
a higher percentage of vapor.
equal amounts of liquid and vapor.
all liquid.
a higher percentage of liquid.
When a thermometer is heated, the red liquid inside the thermometer moves up. This is mainly because:
The molecules of the liquid move faster and get a little further apart
Hot liquid is lighter
The glass of the thermometer gets hot
The red liquid is thin.
When a thermometer is cooled, the red liquid inside the thermometer moves down. This is mainly because:
The glass of the thermometer gets cold
The molecules of the liquid move slower and get a little closer together
The red liquid is thick
Cold liquids sink
Water drops stay together on wax paper and they don't break apart easily. This is mainly because:
Water molecules are in motion
Water molecules are attracted to each other
Water molecules are wet
Water molecules are small
Two gases with unequal masses are injected into opposite ends of a long tube at the same time and allowed to diffuse toward the center. They should begin to mix
closer to the end that holds the heavier gas.
closer to the end that holds the lighter gas.
exactly in the middle.
in approximately five minutes.
To describe a solid, which is incorrect statement:
The particles of a solid can move past one another
The particles of a solid vibrate but do not move past one another
A solid has mass and takes up space
The particles of a solid are attracted to each other
To describe a liquid, you could say:
The particles of a liquid are able to move past one another
A liquid has mass and takes up space
All of the above
The particles of a liquid are in motion and attracted to one another
To describe a gas, which is incorrect statement:
The particles are not very attracted to each other
The particles of a gas are further apart than the particles in a liquid or solid
All of the above
The particles are very attracted to each other
The particles in a liquid are usually
farther apart and higher in energy than those in a gas.
closer together and lower in energy than those in a gas.
farther apart and lower in energy than those in a solid.
closer together and lower in energy than those in a solid.
The compressibility of solids is generally
higher than the compressibility of liquids only.
about equal to the compressibility of liquids and gases.
higher than the compressibility of gases only.
lower than the compressibility of liquids and gases.
Particles within a solid
vibrate about fixed positions.
move about freely.
exchange positions easily.
do not move.