Page 44 - FINAL DBS10012_HEAT TEMPERATURE 20102022 (2) (1)

Sample 2

a. List and explain TWO (2) ways of heat transfer.

b. Faris is cooling down a bowl of water with a mass, m (kg) from 90 ° C to (4 marks)
45 ° C. If the quantity of heat released from the water is 9.6 kJ, calculate

the mass, m (kg) of the water. (Specific Heat Capacity of water is 4200 (6 marks)
J/kg°C).

c. An aluminum plate with a mass of 500g has been heated from 31 °C to

80 °C . Then the aluminum plate was placed into a container that has
700g of Liquid Y at a temperature of 15 °C. Calculate:

(5 marks)
i) The quantity of heat that is used to heat an aluminum plate (Specific

Heat Capacity of aluminum is 950 J/kg°C)
ii) The final temperature of the mixture (Specific Heat Capacity of liquid

Y is 450 J/kg°C) (10 marks)

Sample 3

a. Define each of the following terms;
i. Heat Capacity
ii. Specific Heat Capacity

(2 marks)
b. i. Describe TWO (2) processes of heat transfer
(2 marks)
ii. State TWO (2) applications of heat transfer in daily life.

(4 marks)
c. A geologist working in the field drinks her morning coffee using an
(2 marks)
aluminum cup with the mass of 120g at 20 °C. If she pours in 300g of

coffee at 70 °C, calculate the final temperature after the coffee and the
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