Change from a liquid to a gas at the surface of the liquid
Change from a gas to a liquid
Evaporation means to change from a liquid to a gas at the surface of the liquid.
True
False
Condensation is a change from a liquid to a gas.
True
False
A change in matter from one state (such as solid, liquid, or gas) to another is called
a phase change
condensation
melting
What happens to the particles of a liquid as the liquid freezes?
They speed up and move further apart
They slow down and move farther apart
They slow down and move closer together
They speed up and move closer together
What happens to the particles of a liquid as the liquid evaporates?
They speed up and move further apart
They slow down and move farther apart
They slow down and move closer together
They speed up and move closer together
Heat energy is added at a constant rate to a mixture of ice and liquid water. Which statement is true about that process?
The temperature rises as the ice and water mixture heats up
The temperature rises but only until the ice melts
The temperature stays constant until the ice melts
The temperature of only the liquid water rises (not the ice)
Which if these statements about energy and phase changes is FALSE? Only one of them is FALSE.
It takes energy to melt a solid to a liquid because, in order to melt, the particles need to be speeded up and moved farther apart.
It takes energy to turn a liquid into a gas, because you have to destroy the particles that make up the liquid.
Energy flows(exit) out when a gas changes to a liquid.
As heat is added to a solid, the temperature won't change until all of the solid has melted.
Which statement about the parts of a heating curve (the graph of temperature vs. amount of heat added) is true? Assume the heating curve begins with a solid.
The melting point and the freezing point are the same temperature.
The temperature rises at a constant rate as the heating happens.
The temperature rises faster during a phase change than it does when a phase change isn't happening.
The condensation point is at a lower temperature than the boiling point.
Which phase of matter has the slowest moving particles?
Solid
Liquid
Gas
In which phase of matter are the particles moving the fastest?
Solid
Liquid
Gas
In which phase change would energy be released (exothermic)?