In two colorimeters we poured 200 gm of water each at temperature of + 30ºC and +40ºC. From the 'hot' calorimeter 50 gm of water, is poured into 'cold' calorimeter and stirred. Then, from 'cold' colorimeter 50 gm of water is poured into 'hot' and again stirred. How many times from starting do you have to poured the same portion of water back and forth so that temperature difference between water in colorimeters becomes less than 3ºC? Heat loss during transfer and heat capacity of calorimeters is neglected.
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