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# My aim is to measure the specific heat capacity of 4 metals and find out if they all have the same specific heat capacity or different.

Extracts from this document...

Introduction

By Gulraj Chatha                               26-06-03

Do all metals have the same

Specific heat capacity?

Aim:

My aim is to measure the specific heat capacity of 4 metals and find out if they all have the same specific heat capacity or different.

Prediction:

The specific heat capacity is the amount of heat energy needed to raise 1kg by 1 C and is measured in joules.

My prediction is that the metal with the least massive atoms will heat up more quickly because they require less heat energy to make the molecules move around and heat up. The weight of the atoms is an important factor, that’s because the atoms may heat up at different rates. The bigger the atom the more slowly it will take to heat up and the more heat energy is needed to make the molecules get hotter and move around.

Preliminary Investigation

In this short investigation, I will time the temperature every 30 seconds until it will reach 20 C higher than the starting temp that I will have recorded.

Middle

- 10.25

1.30s

24 ½

- 3.61

- 10.24

2.00s

25

- 3.64

- 10.27

2.30s

28

- 3.64

- 10.25

3.00s

30 ½

- 3.65

- 10.23

3.30s

34

- 3.67

- 10.24

4.00s

36

- 3.67

- 10.25

4.30s

39

- 3.69

- 10.25

5.00s

42

- 3.64

- 10.24

5.30s

44 power pack off

- 0.03

- 0.00

6.00s

47

- 0.02

- 0.00

6.30s

48 highest temp

Aluminium!

 Time Every 30s TempIn  CStarting temp = 22 Amps Volts 30s 22 - 3.62 - 10.25 1.30s 22 ½ - 3.61 - 10.24 2.00s 24 - 3.64 - 10.27 2.30s 24 ½ - 3.66 - 10.25 3.00s 25 ½ - 3.65 - 10.23 3.30s 26 - 3.67 - 10.24 4.00s 28 - 3.67 - 10.25 4.30s 29 ½ - 3.66 - 10.25 5.00s 31 - 3.64 - 10.24 5.30s 32 - 3.66 - 10.25 6.00s 33 ½ - 3.65 - 10.23 6.30s 34 ½ - 3.67 - 10.25 7.00s 36 - 3.66 - 10.24 7.30s 37 - 3.65 - 10.23 8.00s 38 ½ - 3.64 - 10.24 8.30s 40 - 3.66

Conclusion

Starting temp = 20 ½

Amps

Voltage

4.00s

42 power pack off

- 0.01

- 0.00

Copper!

 4.30s 43 power pack off - 4.89 - 13.56 5.30s Over 50 C is the highest temp.
 Time Every 30s TempIn  CStarting temp = 22½ Amps Volts

Steel!

 Time Every 30s TempIn  CStarting temp = 22 Amps Volts 9.30s 42 power pack off and highest temp. - 0.00
 Time Every 30s TempIn  CStarting temp = 22½ Amps Volts 4.30s 43 power pack off - 4.89 - 13.58 5.30s Over 50 C is the highest temp.

Aluminium!

 Metal Volts Amps Time Mass Average Temp change SpecificHeatCapacity. Aluminium 10.28 3.73 570 1 20 = 1092.8154 Copper 13.58 4.89 198 1 21 = 657.42138 Steel 10.28 3.69 300 1 20 = 568.99813 Brass 13.54 4.93 198 1 22 = 600.76984

Specific Heat Capacity!

I have used the formula;   C = Q

M ∆t

Evaluation

I think that I have recorded successfully and accurately as I can on the practical experiments such as the preliminary results. I have taken down the time and the temperature every 30seconds as best as I could. Also I feel I have done well is carrying out doing a fair test in my experiments. I feel that I could have done my graph plots every 15seconds to make the whole experiment more accurate.

I could have improved more in what I was doing in this investigation by working at a more rapid pace to cool down the equipment that I previously used and not get distracted by talking.

By Gulraj Chatha

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

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