Question 7
Figure 7 shows how the temperature of 10 g of wax changes as it is being heated with a constant heat source.
(a) Name the process occuring from point D to E.
(b) Explain why the time taken for BC is shorter than DE.
In a second experiment, the same heat source is used to heat 5 g of wax. The initial temperature of the wax is also 20°C.
(c) Sketch on the graph in the Answer Booklet, a line to show how the temperature of the wax changes with time in the second experiment. You may ignore heat loss to the surroundings.
(a) Name the process occuring from point D to E.
(b) Explain why the time taken for BC is shorter than DE.
In a second experiment, the same heat source is used to heat 5 g of wax. The initial temperature of the wax is also 20°C.
(c) Sketch on the graph in the Answer Booklet, a line to show how the temperature of the wax changes with time in the second experiment. You may ignore heat loss to the surroundings.