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- 1. Multiple Choice
Where on a heating curve graph are the phase/state changes?
slopes
plateaus
- 2. Multiple Choice
Where on a heating curve graph does kinetic energy and temperature both change?
slopes
plateaus
- 3. Multiple Choice
Where on a heating curve graph is there no temperature change?
at the slopes when phase/state changes occur
at the plateaus when phase/state changes occur
- 4. Multiple Choice
Given the heating curve of water, what is happening to potential and kinetic energy during segment CD?
the potential energy and kinetic energy both increase
the potential energy increases while the kinetic energy decreases
the potential energy is constant while the kinetic energy increases
the potential energy increases while the kinetic energy is constant
- 5. Multiple Choice
Given the heating curve of a solid being heated at a constant rate, what is the boiling point of this substance?
20°C
50°C
110°C
170°C
- 6. Multiple Choice
Given the heating curve of a solid being heated at a constant rate, how much total time was required to boil this substance after it reached its melting point?
3 minutes
4 minutes
10 minutes
14 minutes
- 7. Multiple Choice
Given the heating curve of a solid being heated at a constant rate, during which time segment was there a change in kinetic energy?
between min 3 and 4
between min 4 and 5
between min 10 and 12
between minutes 14 and 15
- 8. Multiple Choice
NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture. What is the melting point of this substance?
0°C
801°C
1000°C
1465°C
- 9. Multiple Choice
NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture.During which segments of the diagram is potential energy constant? (Check all that apply)
AB
BC
CD
DE
- 10. Multiple Choice
NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture.During which segments of the diagram is potential energy increasing? (Check all that apply)
AB
BC
CD
DE
- 11. Multiple Choice
NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture. Which phase(s) of matter are present during segment BC? (Check all that apply)
solid
liquid
gas
plasma
- 12. Multiple Choice
NaCl(s) was heated up starting at an initial temperature of 0°C. The heating curve is shown in the picture. Which phase change is occurring during segment DE?
solidification
fusion
vaporization
condensation
- 13. Multiple Choice
Given the heating curve for water, during which line segment could I find water in both the solid and liquid phase at the same time?
AB
BC
CD
DE
EF
- 14. Fill in the Blank
What is the melting point of the substance given the heating curve? Just type the number and no unit. Don't use any sig figs or decimals.
- 15. Fill in the Blank
Given the heating curve, what is the boiling point of the substance? Just type the number and no unit. Don't use any sig figs or decimals.
- 16. Multiple Choice
Given the heating curve of water, what is happening to potential and kinetic energy during segment DE?
the potential energy and kinetic energy both increase
the potential energy increases while the kinetic energy decreases
the potential energy is constant while the kinetic energy increases
the potential energy increases while the kinetic energy is constant
- 17. Multiple Choice
NaCl(s) was cooled starting at an initial temperature of 1465°C. The heating curve is shown in the picture. What is the condensation point of this substance?
0°C
801°C
1000°C
1465°C
- 18. Multiple Choice
NaCl(s) was cooled starting at an initial temperature of 1465°C. The heating curve is shown in the picture. What is the solidification point of this substance?
0°C
801°C
1000°C
1465°C
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