WorksheetsPhase Changes and Phase Diagrams
Total questions: 15
Worksheet time: 15mins
The diagram below shows the different phase transitions that occur in matter. Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?
2
3
4
5
A solid substance turns directly into a gas. Which term describes this change?
deposition
evaporation
melting
sublimation
In which phase transition do molecules move directly from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles?
evaporation
sublimation
freezing
deposition
Which energy change occurs during boiling?
Some heat energy of the substance is lost.
Heat energy of the substance remains the same.
Most heat energy of the substance is lost.
Heat energy is absorbed by the substance.
The arrows in the chart below represent phase transitions. Which arrows represent the phase transitions in which heat energy is gained?
1, 2, and 3
2, 3, and 5
3, 4, and 5
4,5, and 6
Which example involves a phase change in which heat energy is released by the substance?
freezing ice cream
cooking a pot of soup
melting ice under sunlight
watching frost disappear into air
Jean has a sample of a liquid. If she changes the liquid’s phase by ____________ it, the molecules will spread out, allowing the sample to expand and fill a container of any shape or volume.
evaporating
freezing
condensing
melting
What letter on the diagram represents a substance only in the liquid?
A
B
C
D
What letter on the diagram represents a substance only in the solid phase?
A
B
C
D
What letter on the diagram represents the triple point?
A
B
C
D
What would the state of this substance be at 0.5 ATM of pressure at a 100 degrees Celsius?
Solid
Liquid
Gas
Michigan
What happens along the BC line?
Melting/Freezing
Boiling/Condensing
Boiling/melting
freezing/condensing
What is the phase change called when a gas turns into a liquid?
A) Condensation
B) Evaporation
C) Sublimation
D) Freezing
Which point on a phase diagram represents the temperature and pressure at which all three phases of a substance coexist in equilibrium?
A) Critical point
B) Triple point
C) Boiling point
D) Melting point
In a phase diagram, what does the line separating the solid and liquid phases represent?
A) The boiling point curve
B) The sublimation curve
C) The melting point curve
D) The critical point
