Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

Fig. 3.1 depicts a small block of ice floating in a beaker containing warm water. The labels on the diagram are: block of ice, warm water.
(a)[1]

State one difference between the motion of the particles in ice and the motion of the particles in water.

(b(i))[1]

State the name of the thermal process that carries energy from the water to the ice.

(b(ii))[2]

Calculate the energy lost by this water as its temperature falls from $28\text{ ^{\circ}C}$ to $10\text{ ^{\circ}C}$.

(b(iii))[3]

Explain how convection makes the temperature of all the water in the beaker decrease.

(b(iv))[2]

State how the internal energy of the water changes as its temperature decreases. Describe the change in terms of particle energy.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: Particles in ice oscillate about fixed positions OR particles in water move freely through the liquid

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