Steam burn is more severe than that of boiling water because
A. steam burn is independent of relative humidity B. stem possesses greater heat energy per unit mass C. water boils at a higher temperature D. steam burn is dependent on relative humidity
Correct Answer: B
Explanation
The specific latent heat of vaporization of steam is 2.1 x 106JKg-1 while the energy required to raise the temperature of a unit mass of water from 0°c to 100°c = C x Dt = 4200 x 100 = 420000 = 4.2 x 105 JKg-1 ∴ steam possesses greater heat energy per unit mass
