Heat Transfer Lab Experiment
Heat is the transfer of energy between matter due to differences in temperature. In this experiment, heat transfer was studied by calorimetry. The mixing of warm and cool water was observed, as well as the experimental latent heat of fusion.
Data:
Mixing Warm and Cold Water Table
| Mass of Empty Graduated Cylinder | 86.9 grams | ||||
| Trial 1 | Trial 2 | ||||
| Mass of Graduated Cylinder and Cold Water | 136.00 g | 136.15 g | |||
| Mass of Cold Water | 49.10 g |
49.25 |
|||
| Temperature C, Probe 1 |
22.5 |
24 |
|||
| Minimum |
31.7 |
31 |
|||
| Maximum | |||||
| Trial 1 | Trial 2 | ||||
| Mass of Graduated Cylinder and Hot Water | 135.25 g | 133.58 g | |||
| Mass of Hot Water | 48.35 g | 46.68 g | |||
| Temperature C, Probe 2 | |||||
| Minimum |
31.7 |
31 |
|||
| Maximum |
39.7 |
36.9 |
|||
| Latent Heat of Fusion Table | |||||
| Trial 1 | Trial 2 | ||||
| Mass of Inner Calorimeter Cup and Stirrer | 28.31 g | 28.31 g | |||
| Mass of the Stirrer | 5.03 g | 5.03 g | |||
| Mass of Inner Cup and Warm Water | 121.12 g | 121.09 g | |||
| Mass of Warm Water | 97.84 g | 97.81 g | |||
| Mass of Inner Cup, Ice, & Warm Water | 137.13 g | 138.91 g | |||
| Mass of Ice | 16.01 g | 17.82 g | |||
| Initital Watter Temperature |
37.9 |
25 |
|||
| Final Water Temperature |
22.8 |
41.5 |
|||
Analysis
1. Calculate the temperature change, Dt, for the warming of cold water and the cooling of warm water.
2. Calculate the heat gained by the cold water (in J).
3. Calculate the heat lost by the warm water (in J)
5. Calculate the percent difference between the heat lost by the warm water and the heat gained by the cold water for each trial.
6. What are some factors that might have caused the difference determined in question 5?
There was additional heat transfer to the surroundings of the system.
PROCESSING THE DATA
1. Calculate the experimental latent heat of fusion (in J/kg) for each trial.
2. Calculate the average of the two experimental values for the latent heat of fusion. An accepted value for the heat of fusion of ice is 3.34 X 105 J/kg. Compare your average experimental value with the accepted value.
3. Give some reasons as to why your answer to question #2 was not zero.
The ice was heated by its surroundings for a significant time prior to the experiment. This experiment failed to measure that heat transfer.
Conclusion
In conclusion, the energy transfer between matter, heat, was studied by calorimetry. General heat transfer and latent fusion was observed in water.
