MC
Which stat of matter has a definite volume but does not have a definite shape?
solid
liquid
gas
vapor
liquid
Boyle's lab relates pressure and
temperature
number of particles
volume
mass
volume
has an indefinite volume but a definite shape
none
What does the kinetic theory say about the motion of atoms?
States that all particles of matter are in constant motion.
Two liters of hydrogen gas are stored at a pressure of 100 kPa. If the temperature does not change, what will the volume of the gas be when the pressure is decreased to 25 kPa?
8.0L
In which state(s) of matter can materials take the shape of their containers?
Solid and Liquid
solid and gas
liquid and gas
liquid only
liquid and gas
The phase change that is the reverse of vaporization is
freezing
melting
condensation
evaporation
condensation
has a definite volume and a definite shape
solid
How does increasing the number of particles of a contained gas affects its pressure?
Increasing the number of particles will increase the pressure of a gas if the temperature and the volume are constant
A cylinder that contains air at a pressure of 100 kPa has a volume of 0.75L and a temperature of 20 degrees C. The pressure is increased to 300 kPa, and the temperature is decreased to 15 decreased to 15 degrees C. Find the new volume of air.
0.25 L
Which statement is true about the atoms in a gas?
they travel in circular paths
they have strong attractions to one another
they are not closely packed
they are arranged in an orderly pattern
they are not closely packed
Which of the these phase changes does NOT involve changing a liquid into a gas?
Sublimation
Vaporization
Evaporation
Boiling
Sublimation
has an indefinite volume and an indefinite shape
gas
What happens to the temperature of a substance during a phase change?
the temperature of a substance does not change during a phase change
The SI Unit of pressure is
pascal
newton
square meter
Psi
pascal
Which of the following is NOT a factor that affects gas pressure?
Temperature
Pressure
Volume
Number of Particles
Pressure
has an indefinite shape and a definite volume
liquid
Using the kinetic theory, explain why a liquid has a definite volume but a gas does not.
The attraction between particles in a liquid are strong enough to keep particles close together. Without any significant attractions between particles in a gas, the particles are free to expand into any volume that is available.
Increasing which variable would decrease the pressure of a contained gas?
temperature
number of particles
volume
mass
volume
Pressure is the result of force distributed over an..
area
perimeter
field
system
area
has a definite size, shape, and volume
none
How does an endothermic phase change differ from an exothermic phase change?
During an endothermic phase change energy is absorbed. During an exothermic phase change energy is released by a system