A glass beaker contains a mass of 0.30 kg of water at a temperature of 15 ∘C15\text{ }^\circ\text{C}15 ∘C.
The specific heat capacity of water is 4200 J/(kg ∘C)4200\text{ J}/(\text{kg }^\circ\text{C})4200 J/(kg ∘C).
An iron block of mass 0.20 kg is at a temperature of 165 ∘C165\text{ }^\circ\text{C}165 ∘C. The block is carefully lowered into the beaker of water.
The final temperature of both the water and iron is 25 ∘C25\text{ }^\circ\text{C}25 ∘C.
What is the specific heat capacity of the iron?
(Assume that no water is lost and no thermal energy has been transferred to the beaker or the surroundings.)
380 J/(kg ∘C)380\text{ J}/(\text{kg }^\circ\text{C})380 J/(kg ∘C)
450 J/(kg ∘C)450\text{ J}/(\text{kg }^\circ\text{C})450 J/(kg ∘C)
900 J/(kg ∘C)900\text{ J}/(\text{kg }^\circ\text{C})900 J/(kg ∘C)
6300 J/(kg ∘C)6300\text{ J}/(\text{kg }^\circ\text{C})6300 J/(kg ∘C)
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.