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.