A beaker contains 0.400 kg0.400\text{ kg}0.400 kg of water at a temperature of 15.0∘C15.0^\circ\text{C}15.0∘C. The water is heated, and its internal energy increases by 25.2 kJ25.2\text{ kJ}25.2 kJ. The specific heat capacity of water is 4200 J/(kg∘C)4200\text{ J}/(\text{kg}^\circ\text{C})4200 J/(kg∘C). What is the temperature of the water after it has been heated?
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.