Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with increase in temperature and vanishes at boiling point. Given that the latent heat of vaporation for water `rho_(w) = 540kcal/kg`,mechanical equivalent heat =4.2j/cal Avogadro's No. `N_A = 6.0 xx 10^26 `, and the molecular weight of water `M_A` = 18 kg for 1 k mole.
Estimate the energy required for oe molecule of water to evaporate.