A copper calorimeter of mass 150g, was half filled with water of mass 300g and temperature 0 degrees celcius. 5g of ice at 0 degrees celcius was added to the content, later some quanity of steam was passed into the mixture and the temperature rose by 20 degrees celcius. Calculate the quantity of steam added. (specific latent heat of vaporisation of steam= 2.26 * 10^6j/kg, specific heat of copper=400j/kg/k).
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