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# Specific Heat Capacity Lab data and processing

Extracts from this document...

Introduction

Justin Germani        Specific Heat Capacity        January 24, 2012

Data:

Object 1

 Massm/g∆m = ±0.1 g TemperatureT/ (°C)      ∆T= ±0.1°C initial final change Object 62.3 100.3 26.4 -73.9 Aluminum Calorimeter w/ water 156.5 23.1 26.4 +03.3 water 114.0 - - -

Object 2

 Massm/g∆m = ±0.1 g TemperatureT/ (°C)      ∆T= ±0.1°C initial final change Object 34.5 100.6 29.2 -71.4 Aluminum Calorimeter w/ water 155.6 26.2 29.2 +03.0 water 113.1 - - -

Object 3

 Massm/g

Middle

34.4

+06.3

water

112.9

-

-

-

For each table above:
∆- represents uncertainty
-mass of Aluminum Calorimeter is 42.5g

Sample Calculations:

Calculate specific heat capacity (c):

Object 1

Q lost by block = Q gained by water + Q gained by Al 0.0623(c)(-73.9) = 0.114(4200)(03.3) + 0.0425(910)(03.3)
c = 371 J/kg/°C  (3 significant figures)

Results:

 Specific Heat Capacityc / JKg-1°C-1 Object 1 370.9 Object 2 625.6 Object 3 318.9

Data:

Freezing Aluminum block

 Massm/g∆m = ±0.1 g TemperatureT/ (°C)      ∆T= ±0.1°C initial final change Aluminum block 62.3 16.2 Aluminum calorimeter 46.5 - - - Aluminum Calorimeter w/ water 156.5 19.7 16.2 -03.5 water 114.0 - - -

Calculate Initial Temperature of Aluminum block:

Q

Conclusion

The % difference of object two was very large at 31.3% this could be due to random error but more likely due to the block not being fully submerged as I mentioned earlier.

The value of the percentage difference for Object3 which was Copper was relatively high at 17.2%,

In order to improve upon the experiment a scale that measures up to a higher mass such as 500g. Another method to improve the experiment would be to add more water to the calorimeter in order to insure the block was fully submerged. Another improvement that could be made would be to not drop the blocks into the calorimeter and therefore minimize the risk of losing water after the mass was taken.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

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