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cold water has gained 20 C. ; in general, the heat gained 

 by a cold body equals the heat lost by a warm body. 



Weigh 200 gm. of hot water in a glass beaker and 

 pour it into a vessel covered with raw cotton or wool. 

 Then weigh 200 gm. of cold water in the same beaker. 

 Note carefully the temperature of both hot and cold water 

 and quickly pour the cold water into the hot water. Stir 

 the mixture and then note its temperature. 



The amount of heat gained by one gram of water when 

 it is heated one degree, or lost by one gram of water when 

 it is cooled one degree is called a Calorie. Compute the 

 number of calories which your cooler water has gained. 

 Then compute the number of calories which your warmer 

 water has lost. Compare the amount of heat lost by the 

 hot water and the amount gained by the cold water. 



Why is the temperature of scalding water lowered so 

 much when dishes are put into it that no cold water need 

 be added in order to prevent the hands from burning while 

 washing the dishes ? 



C.I.. LAB. 2 



