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WorksheetsHeating/Cooling Curves
Total questions: 32
Worksheet time: 1hrs 5mins
This curve indicates what about the heat energy?
Heat energy is being added or absorbed
Heat energy is being released
This curve indicates what about the heat energy?
Heat energy is being added or absorbed
Heat energy is being released
In which region(s) of the graph does a phase change occur?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be a solid only?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be a solid and a liquid at the same time?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be a liquid only?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be a liquid and a gas at the same time?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be a gas only?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph does boiling take place?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph does melting take place?
Region 1
Region 2
Region 3
Region 4
Region 5
In which region(s) of the graph would the substance be melting?
No melting occurs on this graph
Region C-E
Region E-G
Region G-I
Region I-K
In which region(s) of the graph would the substance be freezing?
Region A-C
Region C-E
Region E-G
Region G-I
Region I-K
In which region(s) of the graph would condensation occur?
Region A-C
Region C-E
Region E-G
Region G-I
Region I-K
What is the boiling point for this substance?
40 °C
60 °C
120 °C
140 °C
What is the freezing point of the substance?
0oC
60oC
120oC
180oC
What is the melting point of the substance?
170oC
110oC
50oC
0oC
Melting and freezing occur at the same temperature!
True
False
I don't know
Which of these conditions is always true for an exothermic process?
They absorb energy from the surroundings
They release energy into the surroundings.
Which of these conditions is always true for an endothermic process?
They absorb energy from the surroundings
They release energy into the surroundings.
From point A to point E, the sample is going through an __________ process by __________.
exothermic, releasing heat to the surroundings
exothermic, absorbing heat from the surroundings
endothermic, releasing heat to the surroundings
endothermic, absorbing heat from the surroundings
From point A to point F, the sample is going through an __________ process by __________.
exothermic, releasing heat to the surroundings
exothermic, absorbing heat from the surroundings
endothermic, releasing heat to the surroundings
endothermic, absorbing heat from the surroundings
When you freeze water, it turns to ice. What kind of change is this?
endothermic
exothermic
Which point on the graph is when the substance has the highest average kinetic energy?
A
B
D
F
What happens to the energy of particles in a substance as it changes from solid, to liquid, to gas?
KE decreases
KE increases
KE stays the same
KE goes up and then goes down
Which point on the graph is when the substance has the highest average kinetic energy?
A
B-C
D-E
F
Which interval is potential energy decreasing while kinetic energy stays the same?
AB
CD
DE
EF
Which statement describes the energy of the particles in this sample during interval CD?
Both PE and KE increase.
Both PE and KE decrease.
PE stays the same and KE increases.
PE increases and KE stays the same.
Which statement describes the energy of the particles in this sample during interval D to E?
Both PE and KE increase.
Both PE and KE decrease.
PE stays the same and KE increases.
PE increases and KE stays the same.
