Do all metals have the same Specific heat capacity?

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. After that I will turn off the heater and time how long the temperature keeps on rising, also recording the highest temperature before the metal cools back down again.

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The equipment I will need is an immersion heater, a thermometer (either 1 C or 1/2 C increments). Ideally 1/2 C increments will be the best and most accurate to use. The immersion heaters will be set at 12 volts, 66 watts/joules per a second. The 4 metals will heat up at different rates because they have different densities. The test result;

Brass!

Time

Every 30s

Temp In C

Starting temp = 20 1/2

Amps

Voltage

30s

20 1/2

– 4.95

– 13.58

1.30s

23

– 4.94

– 13.57

2.00s

26

– 4.95

– 13.61

2.30s

30

– 4.95

– 13.56

3.00s

34

– 4.95

– 13.57

3.30s

38

– 4.93

– 13.54

4.00s

42 power pack off

– 0.01

– 0.00

4.30s

47

– 0.00

– 0.00

5.00s

49

– 0.00

– 0.00

5.30s

Over 50 C is the highest temp.

Copper!

Time

Every 30s

Temp In C

Starting temp = 22 1/2

Amps

Volts

30s

22 1/2

– 4.92

– 13.59

1.30s

23 1/2

– 4.92

– 13.57

2.00s

25 1/2

– 4.89

– 13.57

2.30s

29

– 4.90

– 13.56

3.00s

32

– 4.88

– 13.57

3.30s

37

– 4.88

– 13.58

4.00s

39 1/2

– 4.89

– 13.58

4.30s

43 power pack off

– 4.89

– 13.56

5.00s

47

– 0.01

– 0.00

5.30s

Over 50 C is the highest temp.

Steel!

Time

Every 30s

Temp In C

Starting temp = 24

Amps

Volts

30s

24

– 3.61

– 10.25

1.30s

24 1/2

– 3.61

– 10.24

2.00s

25

– 3.64

– 10.27

2.30s

28

– 3.64

– 10.25

3.00s

30 1/2

– 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

Temp In C

Starting temp = 22

Amps

Volts

30s

22

– 3.62

– 10.25

1.30s

22 1/2

– 3.61

– 10.24

2.00s

24

– 3.64

– 10.27

2.30s

24 1/2

– 3.66

– 10.25

3.00s

25 1/2

– 3.65

– 10.23

3.30s

26

– 3.67

– 10.24

4.00s

28

– 3.67

– 10.25

4.30s

29 1/2

– 3.66

– 10.25

5.00s

31

– 3.64

– 10.24

5.30s

32

– 3.66

– 10.25

6.00s

33 1/2

– 3.65

– 10.23

6.30s

34 1/2

– 3.67

– 10.25

7.00s

36

– 3.66

– 10.24

7.30s

37

– 3.65

– 10.23

8.00s

38 1/2

– 3.64

– 10.24

8.30s

40

– 3.66

– 10.25

9.00s

41

– 3.65

– 10.25

9.30s

42 power pack off and highest temp.

– 0.00

Variables

The metals;

Copper- mass of 64 per atom

Aluminium- mass of 27 per atom

Steel and brass are both alloys.

The thermometers;

1/2 C increments – more accurate readings

1 C increment – less accurate readings

Fair Test

To make it a fair test I will need to ensure that the metals all have the same masses. I need to make sure that as accurately as possible that I heat the 4 different metal blocks to 20 C above each of there starting temperatures (likely to be room temperature). I will have to make sure that I leave the voltage the same for all the metals.

Apparatus:

Procedure:

* First you will have to place the thermometer in the metal and record what the starting temperature is.

* Secondly you put the immersion heater in the other hole on top of the metal.

* You then join all the leads or parts together to the power pack, including;

1 Ammeter

1 volt meter

* Then you switch the power pack on from the plug.

* Last of all, check that the voltage is on twelve watts and turn the power and the stop clock on at the same time.

Results!

I am going to find out the specific heat capacity by using this formulae; C = Q

M ?T

That formula will work out the specific heat energy of the metal block.

The Results!

Brass!

5.30s

Over 50 C is the highest temp.

Time

Every 30s

Temp In C

Starting temp = 20 1/2

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

Temp In C

Starting temp = 22 1/2

Amps

Volts

Steel!

Time

Every 30s

Temp In C

Starting temp = 22

Amps

Volts

9.30s

42 power pack off and highest temp.

– 0.00

Time

Every 30s

Temp In C

Starting temp = 22 1/2

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.

Cite this page

Do all metals have the same Specific heat capacity?. (2020, Jun 02). Retrieved from https://studymoose.com/metals-specific-heat-capacity-new-essay

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