Latent heat - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1978

The latent heat of fusion of ice is 80cal g^-1. How much heat is required to change 10g of ice at Q^oC into water at the same temperature?

A. 80 cal
B. 10 cal
C. 8 cal
D. 800 cal
E. 400 cal

Question 3:

• JAMB 1978

The following are some units i. Ns ii. Mm iii. Nm^-2 iv. J^oK^-1. What are the units of latent heat?

A. I
B. Ii
C. Iii
D. Iv

Question 4:

• JAMB 1981

The latent heat of fusion of a substance is the heat required to

A. Raise the temperature of unit mass of the substance by 1 ^oC
B. Maintain unit mass of the substance at constant temperature
C. Change unit mass of substance from solid to liquid at constant temperature
D. Change unit mass of liquid to vapour at constant temperature
E. Raise the temperature of unit mass by 100^oC

Question 5:

• JAMB 1994

Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1]

A. 336W
B. 450W
C. 560W
D. 600W