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WorksheetsStates of Matter and Phase Changes Quiz
Total questions: 30
Worksheet time: 15mins
Which state of matter can be easily compressed?
Solid
Liquid
Gas
Solution
Which state of matter has particles that are tightly packed and vibrate in place?
Solid
Liquid
Gas
Solute
The phase change from a solid directly to a gas, as seen with dry ice, is called:
Melting
Evaporation
Sublimation
Condensation
The phase change from a liquid to a solid is called:
Melting
Freezing
Boiling
Deposition
What are the two factors that can cause a substance to change states (like from liquid to gas)?
Mass and Volume
Temperature and Pressure
Color and Shape
Solutes and Solvents
On a heating curve, what is happening at a plateau?
The temperature is rising fast.
The substance is cooling.
A phase change is occurring.
The substance is being compressed.
On a phase change diagram, what is the 'triple point'?
The highest temperature a liquid can exist.
The highest pressure a gas can exist.
The point where solid, liquid, and gas all exist at once.
The standard temperature and pressure.
When a heating curve is at a plateau, heat is being added, but the temperature isn't rising. Where is the excess energy going?
It dissipates into the air, making it harder for phase changes to occur.
It is making the substance have more kinetic energy which causes the substance to change in pressure.
It is being used to break the bonds to complete the phase change.
It is turning into pressure to cause the phase change to occur faster.
In a sugar-water solution, the sugar is the:
Solvent
Solution
Solute
Substance
In a sugar-water solution, the water is the:
Solvent
Solution
Solute
Substance
Putting salt on icy roads is an example of 'freezing point depression.' This means the salt:
Raises the freezing point of water.
Lowers the freezing point of water.
Raises the boiling point of water.
Lowers the boiling point of water.
Adding a solute (like salt) to water will cause 'boiling point elevation.' This means the water will:
Boil at a higher temperature.
Boil at a lower temperature.
Freeze at a higher temperature.
Boil and freeze at the same time.
Which state of matter completely takes on the shape of its container?
Solid
Gas
Solute
Liquid
What is the phase change called when a gas turns directly into a solid?
Sublimation
Freezing
Condensation
Deposition
What is the phase change called when a gas turns into a liquid?
Evaporation
Sublimation
Freezing
Condensation
On a phase change diagram, what is the 'critical point'?
The point where all three states of matter exist at the same time.
The standard temperature and pressure, at 1 atm and 0 K.
The melting point of a substance at standard pressure.
The temperature and pressure where liquids and gases are indistinguishable.
On a heating curve, the first plateau represents what?
Boiling
Condensation
The solid phase
Melting
On a heating curve, what state(s) of matter is/are present on the second rising (sloped) section, after melting is complete?
Solid
Gas
Solid and Liquid
Liquid
When a solute is dissolved in a solvent, what is the resulting mixture called?
A solid
A colligative
A triple point
A solution
Freezing point depression and boiling point elevation are called 'colligative properties' because they depend on what?
The type of solvent used.
The temperature of the solvent.
The chemical identity of the solute.
The number of solute particles.
On a typical phase change diagram, if you are in the gas phase and you increase the pressure (while keeping the temperature the same), what phase change will likely occur?
Melting
Freezing
Sublimation
Condensation
At standard atmospheric pressure, at what temperature does pure water boil?
0°F
100°F
0°C
100°C
At standard atmospheric pressure, at what temperature does pure water freeze?
100°C
32°C
100°F
0°C
What are the standard temperature and pressure (STP) conditions mentioned in your class resources?
100°C and 1 atm
0°C and 0 atm
100°F and 1 atm
0°C and 1 atm
If you add a large amount of salt to a pot of water, what will happen to its boiling point?
It will boil at 0°C.
It will not change.
It will decrease.
It will increase.
Why do people put salt on icy sidewalks in the winter?
The salt raises the freezing point of the ice, making it melt.
The salt makes the ice colder.
The salt reacts chemically with the ice to create heat.
The salt lowers the freezing point of water, causing the ice to melt.
A solution is made by mixing 10 grams of sugar with 100 grams of water. Which substance is the solute?
The water
Both are solutes
Neither is a solute
The sugar
A solution is made by mixing 200 mL of water with 5 mL of food coloring. Which substance is the solvent?
The food coloring
Both are solvents
The solution
The water
On a phase change diagram, the line separating the solid phase from the liquid phase represents what?
The boiling point at various pressures.
The triple point.
The critical point.
The melting/freezing point at various pressures.
Are phase changes a type of physical or chemical change?
Physical
Chemical
