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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.

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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.

...read more.

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  C

Starting 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

...read more.

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  C

Starting temp = 22½

Amps

Volts

Steel!

Time

Every 30s

TempIn  C

Starting temp = 22

Amps

Volts

9.30s

42 power pack off and highest temp.

- 0.00

Time

Every 30s

TempIn  C

Starting 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

Specific

Heat

Capacity.

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

...read more.

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