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A Level Specific Heat Capacity Questions

 

Q2. An electrical heater is used to heat a 1.0 kg block of metal, which is well lagged. The table shows how the temperature of the block increased with time.

temperature/°C

20.1

23.0

26.9

30.0

33.1

36.9

time/s

0

60

120

180

240

300

(a) Plot a graph of temperature against time

(3 marks)


(b) Determine the gradient of the graph.

(2 marks)

(c) The heater provides thermal energy at the rate of 48 W. Use your value for the gradient of the graph to determine a value for the specific heat capacity of the metal in the block.

(2 marks)

(d) The heater in part (c) is placed in some crushed ice that has been placed in a funnel as shown.

The heater is switched on for 200s and 32g of ice are found to have melted during this time. Use this information to calculate a value for the specific latent heat of fusion for water, stating one assumption made.

(3 marks)

(Total 10 marks)