An electric kettle raises the temperature of the certain mass of water from 0∘C to 100∘C in 2.1 minutes. It takes 11.2 minutes to boil off the water. Calculate the specific heat of vaporization.
2240 Jg-1
Let, mass of water be m and specific latent heat of vaporization = L
Heat absorbed by water in one second = Heat absorbed by steam in one second
m×Cw×(100–0)Time = mLTime
4.2×1002.1×60 = L11.2×60
2 × 100 = L11.2
L = 2240 Jg−1