ig6 



HEATING OUR HOMES 



of return pipes, or if the house is small, it may return 

 through the steam pipe. 



Experiment. To show the great amount of heat stored in steam. 

 Materials: Calorimeter (a soup can will do). Flask. One-hole stopper 

 and tube. Rubber tubing. Steam trap. Thermometer. Ring 

 stand. Burner. 



Steam-heating system. 



Method and Observation: (a) Weigh the calorimeter half full of cold 

 water. Record the temperature. Boil the water in the flask. Con- 

 nect the steam trap and when the water is boiling put the free end of 

 the trap into the cold water. Let it run for about five minutes. Re- 

 move the trap. Stir well, and take the temperature. Weigh. What 

 has caused this increase in weight? How many degrees in tempera- 

 ture was the water warmed by the steam? (b) Fill the calorimeter 

 again with the same quantity of cold water used in (a), and at the 

 same temperature. Pour into it a quantity of boiling water equal in 

 weight to that of the steam added in (a). What is the rise in tem- 

 perature? 



