1060g of urea aqueous solution is subjected to heating. It starts boiling at $100.{53}^{\circ }\mathrm{C}$  . It is heated upto $102.{12}^{\circ }\mathrm{C}$. Amount of water vaporized (in g) is (Pure water boiling point is 100°C, ${\mathrm{k}}_{\mathrm{b}}\mathrm{of}{\mathrm{H}}_2\mathrm{O}\mathrm{is}0.53\mathrm{k}.\mathrm{kg}{\mathrm{mol}}^{-1}$  )