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PERFORMANCE
ASSIGNMENT Lab Five |
For this investigation several factors that govern heat transfer will be examined. Once the empirical data has been obtained, the mathematical relationship between mass and temperature change will be determined.
Objectives:
1.
Identify and use appropriate pieces of equipment to make observations.
2.
Properly record scientific observations.
3.
Evaluate laboratory results and express conclusions as mathematical
relationships.
Procedure:
1.
Pour 60 ml of water into a beaker.
Heat the beaker until the water boils.
2.
Pour 60 ml of water into a large Styrofoam cup. Insert a thermometer and determine the
temperature of the room temperature water.
Record.
3.
Assuming that the boiling water has a temperature of 100oC, predict the
final temperature when the two samples are mixed. Record.
4.
Mix the two samples and let them reach equilibrium, record the final
temperature.
5.
Repeat steps 1 through 4 two more times.
6.
Repeat steps 1 through 4 using 180 ml of water in step 1 and 60 ml in
step 2.
7.
Repeat steps 1 through 4 using 60 ml of water in step 1 and 180 ml in
step 2.
Observations:
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Trial |
Initial Temp Of Water |
Temp of Boiling Water |
Mass of Boiling Water |
Mass of Room Temp Water |
Predicted DT |
Final Temp |
DT Room Temp |
DT Boiling |
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2 |
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3 |
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4 |
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5 |
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Synthesis:
According to the experimental data, which of the following equations best represents the relationship between temperature change and the mass of water?
mhot + DThot = -( mcold + DTcold )
mhot - DThot = DTcold - mcold
mhot DThot = -mcold DTcold
mhot / DThot = mcold /
DTcold