Investigating the Heat Capacity of Metals
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. 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.
The equipment I will need is an immersion heater, a thermometer
(either 1 C or ½ C increments). Ideally ½ 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 ½
Amps
Voltage
30s
20 ½
- 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.
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low current to melt. Below is a graph of the results I expect to get.
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