unit test review chemistry
which is an aspect of the kinetic-molecular theory and can be used to explain the compressibility of plasmas?
Particles move independently of one another and are widely spaced.
Why do amorphous solids not have a long-range order in the arrangement of their particles?
Their formation involves very rapid cooling.
which statement best describes the process that the diagrams show?
a solid gains kinetic energy to become a liquid and the becomes a gas.
Consider the temperature versus time graph below. At what temperature is the substance a heated gas?
above 100°C
when a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. why is the burning of magnesium considered a chemical change?
because a new substance is formed.
a gaseous substance turns directly into a solid. which term describes this change?
deposition
in the diagram below, particles of the substance are moving from the liquid phase to the gas phase at the same rate as they move from the gas phase to the liquid phase. the gas and liquid are at...
equilibrium
if both gases in the same type of container (separate containers though) are at the same temperature, which one has the greater pressure?
gas 2 because it has more particles that are colliding
which is a postulate if the kinetic-molecular theory?
gas particles have a small volume relative to the space between them
which statement describes a chemical property of water?
it reacts with sodium metal.
the diagram below shows the different phase transitions that occur in matter. which best describes the process that arrow 1 represents?
molecules are speeding up during boiling.
which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular theory?
smaller volume = crowded particles = more collisions = higher pressure
which commercial technology commonly uses plasmas?
television
which statement describes a limitation of the kinetic-molecular theory for a gas?
the theory assumes that particles do not experience intermolecular forces
according to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another?
the volume stays the same, but the shape changes to fit the new container.