for Equal Volumes under Constant Pressure. 



213 



Name of gas. 



Oxygen 



Nitrogen 



Hydrogen 



Chlorine 



Bromine 



Nitric oxide 



Carbonic oxide 



Hydrochloric acid . . . 



Carbonic acid 



Nitrous oxide 



Water 



Sulphurous acid 



Hydrosulphuric acid 

 Sulphide of carbon 



Ammonia 



Terchlorideofphos- \ 



phorus J 



Chloride of arsenic 



Marsh-gas 



Chloroform 



Chloride of silicon 

 Chloride of titanium 



Chloride of tin 



Methylic alcohol ... 



Ethylene 



Chloride of ethyle . . . 

 Bromide of ethyle . . . 

 Chloride of ethylene 



Alcohol 



Cyanide of ethyle . . . 



Acetone 



Benzole 



Acetate of ethyle . . 



Ether " 



Sulphide of ethyle . . , 

 Oil of turpentine ... 



2. 



Composi- 

 tion. 



O 2 

 N 2 

 H 2 

 CI* 

 Br2 

 NO 

 CO 

 HC1 



GO 2 



N 2 

 H 2 © 

 SO 2 

 H 2 S 

 GS 2 

 NH 3 



PCI 3 



AsCl 3 



GH 4 



GHC1 3 



SiCl 4 



TiCl 4 



SnCl 4 



OH 4 © 



GW 



G 2 H 5 C1 



G 2 H 5 Br 



G 2 H 4 C1 2 



G 2 H G © 



G 3 H 5 N 



G 3 H 6 © 



C 6 H 6 



G'H 8 © 2 



G 4 H 1O 



G 4 H i0 S 



G 10 H 16 



3. 



Density 



11056 



0-9713 



00692 



2-4502 



5-529 



10384 



0-9673 



1-2596 



1-5201 



1-5201 



0-6219 



2-221 



11747 



26258 



0-5894 



4-751 



6-272 



0-5527 



41244 



5-874 



6-572 



8-970 



11055 



0-9672 



2 223 



3-766 



3-4174 



1-5890 



1-9021 



2-0036 



2-6942 



30400 



2-5573 



31101 



4-6978 



Specific heats under 



constant pressure 



(according to 



Regnault). 



Equal 

 weights. 



0-21751 



0-24380 



3-40900 



0-12099 



005552 



0-2317 



0-2450 



0-1852 



0-2169 



0-2262 



0-4805 



01544 



02432 



01569 



0-5084 



01347 



01122 

 0-5929 

 01567 

 01 322 

 01290 

 00939 

 0-4580 

 0-4040 

 0-2738 

 0-1896 

 0-2293 

 04534 

 0-4262 

 0-4125 

 0-3754 

 0-4008 

 0-4797 

 0-4008 

 05061 



0-640 



0-703 



0-3277 



0-647 



0-777 



0-848 



0-842 



0506 



0-3907 



0-609 



0-714 



0-784 



0-720 



811 



0-826 



1011 



1-218 



1-227 



1-246 



2-378 



Theore- 

 tical 

 specific 

 heats of 

 equal 

 volumes 

 in the 

 state of 

 perfect 



0-238 



0-272 



0-306 



»> 



0-340 



ij 



»> 



0374 

 0-442 



0-476 



0510 



0-578 

 0-646 

 0-680 



1-054 



Differ- 

 ence. 

 Col. 5.- 

 col. 6. 



0-002 

 0001 

 0002 

 0-058 

 0-069 

 0-003 

 -0001 

 0-005 

 0-059 

 0-073 

 0027 

 0071 

 0014 

 0-140 

 0006 



0-334 



0-397 

 0012 

 0307 

 0-437 

 0-508 

 0-502 

 0132 

 0-017 

 0-167 

 0-272 

 0-342 

 0-244 

 0-335 

 0-316 

 0-433 

 0-572 

 0-547 

 0-566 

 1-324 



No. of 

 atoms 



Theore- 

 tical 



ratio of 

 the two 



specific 



heats. 



14 



1-333 



1-286 

 if 



1-250 



>> 



M 



1 222 



1-J82 



1167 



1 i'54 

 1133 

 1118 

 11 



1-069 



As the Table shows, the difference between the observed and 

 the calculated specific heat is not very great in the case of gases 

 which have been ascertained to follow approximately the laws of 

 Mariotte and Gay-Lussac ; it becomes so in the case of gases 

 which we have other reasons for believing depart considerably 

 from these laws. Accordingly, the difference between the ob- 

 served and the theoretical specific heats may be taken as a mea- 

 sure of the degree in which the gases in question respectively 

 depart from the laws of Mariotte and Gay-Lussac under the 



