CAIE IGCSE Physics 2.3.3.5 What Happens to an Object If the Rate Questions

Practise interpreting warming and cooling from energy balance and explaining curves that level near ambient temperature with CAIE IGCSE Physics questions and mark schemes.

Exam points

Interpret warming and cooling from energy balance, and explain cooling curves that level as objects approach ambient temperature.

[Maximum number: 3]

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

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

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

[Total: 8]

line from $100^{\circ} \mathrm{C}$ and falling
falls at decreasing rate
levels off at labelled/approximate $22^{\circ} \mathrm{C}$

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CAIE IGCSE Physics 2.3.3.5 What Happens to an Object If the Rate Questions question 1