36 mL of pure water takes 100 sec to evaporate from a vessel when a heater of 806 watt is used. The `DeltaH_("vaporisation")` of `H_(2)O` is (density of water `=1g//c c)`

50 ml of water takes 5 minutes to evaporate from a vessel on a heater connected to an electric source which delivers 400 W. The enthalpy of vaporization of water is ________ .

The molarity of pure water (density of water= 1g ml^-1 )

400g of pure water is (density =1g//ml )

The heater coil of an elecric kettle is rated at 2000W,200V, How much time will in take is rasing the temperature of 1 litres of water from 20^(@)C to 100^(@)C . Assuming that only 80% of the total heat energy produced by the heater coil is used in raising the temperature of water. Density of water heater coil is used in raising the temperture of water. density of water = 1g cm^(-3) and specific heat of water = 1 "cal" g^(-1) .^(@)C^(-1) .

The heater coil of an elecric kettle is rated at 2000W,200V, How much time will in take is rasing the temperature of 1 litres of water from 20^(@)C to 100^(@)C . Assuming that only 80% of the total heat energy produced by the heater coil is used in raising the temperature of water. Density of water heater coil is used in raising the temperture of water. density of water = 1g cm^(-3) and specific heat of water = 1 "cal" g^(-1) .^(@)C^(-1) .

If the density of pure water is 1g/ml then what is the molarity of water?

The enthalpy of vaporisation for water is 41.2 kJ mol^(-1), DeltaH for the reaction 2H_2O(g) to 2H_2O(l) is :

A vessel is filled with water and kerosence oil. The vessel has a small hole in the bottom. Neglecting viscosity if the thickness of water layer is h_(1) and kerosens layer is h_(2) then the velocity v of flow of water will be (density of water is rho_(1) b g/c c and that of kerosense is rho_(2) g/c c