1a. The heating coil of an aluminium electric kettle is labelled 240V, 4KW of mass 3kg at temperature of 25 degree centigrade is poured into the kettle. The kettle is connected to a 240V supply when its temperature is 25 degree centigrade, calculate the time taken for the water to reach its boiling point b. In what further time will 10 per cent of water in the kettle evaporate away? (Mass of kettle =0.5kg, specific heat capacity of aluminium =900J/kgK.
Specific latent heat of evaporation of water=2.268×106 J/kgk