Page 45 - FINAL DBS10012_HEAT TEMPERATURE 20102022 (2) (1)

cup attain thermal equilibrium? (Specify Heat Capacity of aluminum is (10 marks)
910 J/kg°C and Specify Heat Capacity of coffee is 4200 J/kg°C. there is

no heat exchange with the surroundings)

d. Calculate the heat quantity needed to increase 20N of water from 10°C
to 98°C. (5 marks)

Sample 4

a. Write the definition of temperature and its SI unit.
b. State three (3) methods and examples of heat transfer. (2 marks)
c. An iron block with a mass of 4.5 kg was heated until it reached the
(6 marks)
temperature of 660°C. Then, the iron block was immediately

soaked in 4 kg of oil with temperature of 230°C. Both oil and iron

temperature then settled at 295°C. Given the specific heat capacity
-1
-1
of iron is 0.12 kJkg °C . Calculate:
(4 marks)
i. The quantity of heat transferred from the iron block to the oil. (5 marks)

ii. The specific heat capacity of the oil.

d. Given that 450 g of water at 26°C is added to 250 g of water at

100°C. Determine the final temperature of the mixture (cwater =
(8 marks)
4200J/kg°C)

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