Suggest:
(i) an example of a change of state resulting from the addition of thermal energy to a quantity of material,
(ii) the effect of this change of state on the temperature of the material.
Define the specific heat capacity of a substance.
An insulated beaker holds 200 g200\text{ g}200 g of water at 24∘C24^\circ\text{C}24∘C. In order to cool the water, small pieces of ice at 0∘C0^\circ\text{C}0∘C are added until the water reaches 0∘C0^\circ\text{C}0∘C and no unmelted ice remains.
specific heat capacity of water=4.2 J/(g ∘C) \text{specific heat capacity of water} = 4.2\text{ J}/(\text{g }^\circ\text{C}) specific heat capacity of water=4.2 J/(g ∘C) specific latent heat of fusion of ice=336 J/g \text{specific latent heat of fusion of ice} = 336\text{ J/g} specific latent heat of fusion of ice=336 J/gAssume no thermal energy is lost to or gained from the surroundings.
(i) Calculate the thermal energy lost by the water in cooling to 0∘C0^\circ\text{C}0∘C.
(ii) State the thermal energy gained by the ice in melting.
(iii) Calculate the mass of ice added.
119 exam-style questions on CIE IGCSE Physics 2.2.2a Internal energy and temperature. Each one has a worked solution and a mark scheme showing where the marks go.