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Constructed Response . Topic 1: Matter and Energy
Set H: Phase change diagram, temperature, heat calculation
Base your answers to questions 32 through 35 on the information below.
The graph below shows a compound being cooled at a constant rate starting in
o
o
the liquid phase at 75 C and ending at 15 C.
35.
Teacher Preview Copy
Teacher Preview Copy
32. What is the freezing point of the compound, in degree Celsius? 32.
33. State what is happening to the average kinetic energy of the 33.
particles of the sample between minute 2 and minute 6.
o
34. What Kelvin temperature is equal to 15 C? 34.
35. A d ifferent experiment was conducted with another sample of the same compound starting in the
o
o
soli d phase. The sample was heated at a constant rate from 15 C to 75 C. On the graph above, draw
the resulting heating curve.
Set I: Heat calculation, percent error.
Base your answers to questions 36 and 37 on the information below.
36. In the space below, calculate the total amount
of heat absorbed by the water. Your response
should include both a correct numerical setup
and the calculated result.
37. Determine the student’s percent error for the
energy content of this peanut.
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 365
Set H: Phase change diagram, temperature, heat calculation
Base your answers to questions 32 through 35 on the information below.
The graph below shows a compound being cooled at a constant rate starting in
o
o
the liquid phase at 75 C and ending at 15 C.
35.
Teacher Preview Copy
Teacher Preview Copy
32. What is the freezing point of the compound, in degree Celsius? 32.
33. State what is happening to the average kinetic energy of the 33.
particles of the sample between minute 2 and minute 6.
o
34. What Kelvin temperature is equal to 15 C? 34.
35. A d ifferent experiment was conducted with another sample of the same compound starting in the
o
o
soli d phase. The sample was heated at a constant rate from 15 C to 75 C. On the graph above, draw
the resulting heating curve.
Set I: Heat calculation, percent error.
Base your answers to questions 36 and 37 on the information below.
36. In the space below, calculate the total amount
of heat absorbed by the water. Your response
should include both a correct numerical setup
and the calculated result.
37. Determine the student’s percent error for the
energy content of this peanut.
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 365
