An electric kettle rated at 1500 W boils away 0.3 kg of a liquid at its boiling point in 300 s. Calculate the specific latent heat of vaporization of the liquid.
1.50 x 10 6 Jkg -1
1.35 x 10 6 Jkg -1
1.50 x 10 5 Jkg -1
4.50 x 10 2 Jkg -1