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CAIE IGCSE Physics Heating and Cooling Rates

Practise predicting temperature change when energy input and output rates differ and sketch cooling that slows as an object approaches room temperature.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • predict warming for input greater than output and cooling when output exceeds input
  • sketch a cooling curve with decreasing gradient that levels at ambient temperature

2.3.3.5—What happens to an object if the rate question 1

[Maximum number: 3]

A silver spoon has a thermal capacity of 7.2 J/∘C7.2 \mathrm{~J} /{ }^{\circ} \mathrm{C}.

The spoon is removed from the boiling water and immediately it begins to transfer energy to the surroundings. The temperature of the surroundings is 22∘C22^{\circ} \mathrm{C}.

On Fig. 5.1, sketch a graph to show how the temperature of the spoon changes with time from the instant that it is removed from the water.

Fig. 5.1

Fig. 5.1

[Total: 8]

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