36 



LABORATORY MANUAL 



Apparatus 



Flask 

 Thermometer 



Asbestos cover for liask 

 Flame protector 



Wire gauze 

 Bunsen burner 

 Ring stand 

 Graduate, 100 c.c. 



Directions: A. Place 100 c.c. of water in the flask 

 and set it aside. From the ring stand suspend the flame 

 protector. Adjust it in such a manner that the lower 



part of the protector fits 

 over the upper part of the 

 Bunsen burner. Then 

 place the wire gauze upon 

 the ring. Light the Bun- 

 sen burner and regulate 

 the gas and air for a blue 

 flame of moderate size. 

 Place the burner under 

 the protector. Do not 

 change these adjustments 

 until the experiment is 

 3 completed. 



Take the temperature of 



the water in the flask. Cover the flask with an asbestos 

 cover, and place it on the wire gauze, noting the exact 

 time this is done. Note and record the rise in tempera- 

 ture of the water each minute for ten minutes. Then 

 turn off the gas. 



What is the average number of degrees of rise of 

 temperature per minute ? How many c.c. of water were 



