A student compares how much thermal energy is lost from two metal cans, X and Y. The cans are the same except for the colour of their outer surfaces. The student adds the same volume of hot water to each can and seals each one. The water temperature in each can is then measured at regular time intervals for 35 minutes.
(a(i))[1]
Using Fig. 6.2, work out the decrease in the water temperature in can X during the first five minutes.
(a(ii))[1]
From Fig. 6.2, determine the decrease in the water temperature in can X during the last five minutes.
(b)[2]
Explain why the water cools faster in the first five minutes than it does in the last five minutes of the experiment.
(c)[2]
State the colour of can Y. Give your explanation.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “80 - 56 OR 24^{\circ}C” …