The piece of metal is heated in boiling water until t has reached the temperature of the water. It is then transferred rapidly to some water in a well-insulated cup. A very sensitive thermometer is used to measure the initial and final temperatures of the water in the cup. specific heat capacity of water = 4200 J/(kgK)

The readings from the experiment are as follows.

mass metal = 0.050 kg

mass of water in cup = 0.200 kg initial temperature of water in cup = 21.1°C

final temperature of water in cup = 22.9°C

(i) Calculate the temperature rise of the water in the cup and the temperature fall of

the piece of metal.

temperature rise of water =

temperature fall of metal =

[1]

(ii) Calculate the thermal energy gained by the water in the cup. State the equation that you use.

thermal energy gained =