Home / Aptitude Tests / Physics / 106J of heat is requ...
106J of heat is required to boil off completely 2...

106J of heat is required to boil off completely 2kg of a certain liquid. Neglecting heat lost to the surroundings, the latent heat of vaporization of the liquid is

A.

2.0 x 106J kg-1

B.

5.0 x 106J kg-1

C.

2.0 x 105J kg-1

D.

5.0 x 105J kg-1

Correct answer is D

From the heat exchange involved, the latent heat of vaporization, L can be deduced from the relation:
ML = 106, where M = mass of the liquid.
∴ 2 x L = 106
=> L = 106/2 = 5.0 x 105J kg-1