An insulated beaker contains a mass of 0.40 kg of water at a temperature of 18 ∘C18\ ^\circ\text{C}18 ∘C.
The specific heat capacity of water is 4200 J/(kg ∘C)4200\text{ J}/(\text{kg}\ ^\circ\text{C})4200 J/(kg ∘C).
A metal alloy block of mass 0.30 kg is at a temperature of 94 ∘C94\ ^\circ\text{C}94 ∘C. The block is carefully lowered into the beaker of water.
The final temperature of both the water and the metal block is 24 ∘C24\ ^\circ\text{C}24 ∘C.
What is the specific heat capacity of the metal alloy?
(Assume that no water is lost and no thermal energy has been transferred to the beaker or the surroundings.)
120 J/(kg ∘C)120\text{ J}/(\text{kg}\ ^\circ\text{C})120 J/(kg ∘C)
360 J/(kg ∘C)360\text{ J}/(\text{kg}\ ^\circ\text{C})360 J/(kg ∘C)
480 J/(kg ∘C)480\text{ J}/(\text{kg}\ ^\circ\text{C})480 J/(kg ∘C)
640 J/(kg ∘C)640\text{ J}/(\text{kg}\ ^\circ\text{C})640 J/(kg ∘C)
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.