Quantity of Heat - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1987

22,000J of heat is required to raise the temperature of 1.5kg of paraffin from 20^oC to 30^oC. Calculate the specific heat capacity of paraffin.

A. 1466Jkg^-1oC^-1
B. 2933Jkg^-1oC^-1
C. 4400Jkg^-1oC^-1
D. 5866Jkg^-1oC^-1

Question 7:

• JAMB 1988

The amount of heat needed to raise the temperature of 10kg of copper by 1k is its

A. Specific heat capacity
B. Heat capacity
C. Latent heat
D. Internal energy

Question 8:

• JAMB 1990

1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of ice melted, neglecting heat loss. [specific heat capacity of copper 400Jkg^-1K^-1 and latent heat of fusion of ice 333 x 10³Jkg^-1]

A. 60g
B. 67g
C. 120g
D. 133g

Question 9:

• JAMB 1991

What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100^oC to 80^oC? [the specific latent heat of steam is 2,260,000Jkg^-1, specific heat capacity of water is 4200Jkg^-1K^-1]

A. 4200J
B. 2,260,OOOJ
C. 9,040,000J
D. 9,380,000J

Question 10:

• JAMB 1991

How long does it take a 750W heater to raise the temperature of 1kg of water from 20^oC to 50^oC [specific heat capacity of water = 4200Jkg^-1K^-1]

A. 84s
B. 112s
C. 168s
D. 280s