Page 137 - text book form physics kssm 2020

Chapter 4
Heat
2. Record the initial temperature of the aluminium block, θ .
1
3. Switch on the immersion heater and start the stopwatch at the same time.
4. After fi ve minutes, switch off the immersion heater. Record the highest thermometer
reading as the fi nal temperature of the aluminium block, θ .
2
Results:

Table 4.4
Power of immersion heater, P / W

Heating time, t / s

Mass of aluminium, m / kg

Initial temperature of aluminium, θ / °C
1
Final temperature of aluminium, θ / °C
2
Analysis of data:
Calculate the specifi c heat capacity of aluminium using the formula, c = Pt .
m(θ – θ )
2
1
Conclusion:
What conclusion can be made from this experiment?
Prepare a complete report for this experiment.
Discussion:
1. What can be done to obtain a better thermal contact between the bulb of the
thermometer and the aluminium block?
2. Given specifi c heat capacity of aluminium is 900 J kg °C , compare the value of
–1
–1
specifi c heat capacity of aluminium obtained from the experiment with the value given.
Explain the difference between the two values (if any).

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4.2.3
4.2.3 131