HEAT. 



(28) SPECIFIC HEAT OF GASES. 



The specific heat of a gas is the number of calories (40) required 

 to raise 1 kilog. of it from C. to 1 C. If c p represent the specific 



heat at constant pressure, and c v that at constant volume, =1*421 



Co 



for air, 1 '41 for gases the molecule of which contains two atoms, 

 1'26 if the molecule contains three, and 1"66 if the molecule con- 

 tains only one atom. These numbers are only approximate. 



Air 



Oxygen 2 



Nitrogen N 2 



Hydrogen H 2 



Chlorine Cf 2 



Bromine Br 2 



Nitrous oxide N 2 



Nitric oxide NO 



Carbon monoxide CO 



Carbon dioxide C0 2 



H y drogen chloride H Cl 



Steam H 2 



Sulphur dioxide SO 2 



Hydrogen sulphide H 2 S 



Carbon disulphide . . . , CS 2 



Marsh gas CH 4 



Olefiant gas (ethene) ^2^4 



Ammonia NH 3 



Benzene C 6 H 6 



Alcohol (methyl) CH 4 



Alcohol (ethyl) C 2 H 6 



Ether .. C 4 H 10 



Turpentine C 10 H 16 



Cp 



0-2375 



0-2175 



0-2438 



3-409 



0-121 



0-0555 



0-2262 



0-2317 



0-245 



0-2169 



0-1852 



0-4805 



0-1544 



2432 



0-1569 



0-5929 



0-4040 



0-5084 



0-3754 



0-4580 



0-4534 



0-4797 



0-5061 



Ca 



0-1684 



0-1551 



0-17-27 



2-411 



0-0928 



0-0429 



0-181 



0-1652 



0-1736 



0-172 



0-1304 



0-37 



0-123 



0-184 



0-131 



0-468 



0-359 



0-391 



0-35 



0-395 



0-41 



0-453 



0-491 



