CHEMISTRY AND HEAT 



61 



water 1. The number of B. T. U. required in order to raise 

 or required to be abstracted in order to lower, the temperature 

 of a body a certain number of degrees may be found by the 

 formula Q=Ws (ti-h), 



in which Q = number of B. T. U. required; 



W= weight of body, in pounds; 



s = specific heat of body; 



l l = higher temperature, in degrees P.; 



tz = lower temperature, in degrees P. 



The specific heats of various solids, liquids, and gases are 

 given in the accompanying tables. 



SPECIFIC HEATS OF SOLIDS AND LIQUIDS 



SPECIFIC HEATS OF GASES 



