Page 139 - Teacher Preview Copy
P. 139
.
Topic 1 – Matter and Energy
13. Phase Change Data: Interpreting phase change data
Answer questions 1 – 4 based on the data below:
The data below was collected as a substance in the liquid state cools.
1. Which temperature represents the freezing point of this substance?
o
o
o
o
1) 65 C 2) 42 C 3) 47 C 4) 53 C
2. Between which time is the a solid?
1) 0 – 2 minute 2) 2 – 7 minute 3) 3 – 10 minutes 4) 8 – 10 minute
3. Between which time is the kinetic energy of molecules of the substance remains constant while the
potential energy of the molecule is changing? 3) 8 – 9 min 4) 0 – 10 min
1) 3 – 7 min
2) 0 – 2 min
Need Help? Study Book Pg 13 Set 20
4. Which is true of the kinetic energy and the potential energy of the substance from
time 0 and 2 minute?
1) The kinetic energy is increasing and the potential energy is remaining constant
2) The kinetic energy is decreasing and the potential energy is remaining constant
3) The kinetic energy is remaining constant and the potential energy is decreasing
4) Both the kinetic energy and the potential energy are decreasing
Answer questions 5 – 9 based on the data below:
The data below represents the data collected during a laboratory experiment in which heat was
added at a constant rate to a solid below its freezing point.
Time 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
(minute)
Temperature 20 24 28 32 32 32 35 38 41 44 47 51 54 54 54 54 58 64
o
( C)
5. What is the melting point of the substance? o o
o
o
1) 0 C 2) 32 C 3) 62 C 4) 54 C
6. The boiling point of the substance is 3) 54 C 4) 100 C
o
o
o
o
1) 32 C
2) 41 C
7. Which temperature measurement is of the substance when it a liquid only? o
o
o
o
1) 20 C 2) 44 C 3) 38 C 4) 64 C
th
th
8. Which is true of kinetic energy and potential energy of the substance between the 24 - 30 minutes?
1) The kinetic energy is increasing and the potential energy is remaining constant
2) The kinetic energy is decreasing and the potential energy is increasing
3) The kinetic energy is remaining constant and the potential energy is increasing
4) Both the kinetic energy and the potential energy are remaining constant
9. The process taking place during this laboratory experiment is best describe as
1) Exothermic chemical change 3) Endothermic chemical change
2) Exothermic physical change 4) Endothermic physical change
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 129
Topic 1 – Matter and Energy
13. Phase Change Data: Interpreting phase change data
Answer questions 1 – 4 based on the data below:
The data below was collected as a substance in the liquid state cools.
1. Which temperature represents the freezing point of this substance?
o
o
o
o
1) 65 C 2) 42 C 3) 47 C 4) 53 C
2. Between which time is the a solid?
1) 0 – 2 minute 2) 2 – 7 minute 3) 3 – 10 minutes 4) 8 – 10 minute
3. Between which time is the kinetic energy of molecules of the substance remains constant while the
potential energy of the molecule is changing? 3) 8 – 9 min 4) 0 – 10 min
1) 3 – 7 min
2) 0 – 2 min
Need Help? Study Book Pg 13 Set 20
4. Which is true of the kinetic energy and the potential energy of the substance from
time 0 and 2 minute?
1) The kinetic energy is increasing and the potential energy is remaining constant
2) The kinetic energy is decreasing and the potential energy is remaining constant
3) The kinetic energy is remaining constant and the potential energy is decreasing
4) Both the kinetic energy and the potential energy are decreasing
Answer questions 5 – 9 based on the data below:
The data below represents the data collected during a laboratory experiment in which heat was
added at a constant rate to a solid below its freezing point.
Time 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
(minute)
Temperature 20 24 28 32 32 32 35 38 41 44 47 51 54 54 54 54 58 64
o
( C)
5. What is the melting point of the substance? o o
o
o
1) 0 C 2) 32 C 3) 62 C 4) 54 C
6. The boiling point of the substance is 3) 54 C 4) 100 C
o
o
o
o
1) 32 C
2) 41 C
7. Which temperature measurement is of the substance when it a liquid only? o
o
o
o
1) 20 C 2) 44 C 3) 38 C 4) 64 C
th
th
8. Which is true of kinetic energy and potential energy of the substance between the 24 - 30 minutes?
1) The kinetic energy is increasing and the potential energy is remaining constant
2) The kinetic energy is decreasing and the potential energy is increasing
3) The kinetic energy is remaining constant and the potential energy is increasing
4) Both the kinetic energy and the potential energy are remaining constant
9. The process taking place during this laboratory experiment is best describe as
1) Exothermic chemical change 3) Endothermic chemical change
2) Exothermic physical change 4) Endothermic physical change
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 129
