326 



Mr. Gervaise Le Bas on 



The Volume Relations of Combined Carbon and Hydrogen 

 at the Melting-point. 



Some very interesting relations have been met with among 

 the volumes o£ solid compounds, leading to the conclusion 

 that the valency law and the law o£ corresponding states are 

 valid for the solid state ; but, until the latter shall have been 

 definitely proved, it seems wiser to limit investigation for the 

 present to the liquid volumes of compounds, the constitutions 

 of which are known, and to commence with substances which 

 are not believed to be associated in the liquid state. 



The author has previously dealt with (loc. cit.) the mole- 

 cular volumes of eighteen liquid normal hydrocarbons at the 

 melting-point, the determinations of which have been made 

 by Krafft (Ber. 1882, xv. p. 1716). 



Table I. — The Saturated Normal Hydrocarbons C„H 3n+2 . 



No. 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 



Hydrocarbon. 



W. 



;M. vol 



! =V. 



A for CH . 



M.P. 

 B.P. 



V/W. 



WxS=calc. 

 mol. vol. 



Undecane, 



Dodecane, 



Tridecane, 



Tetradecane, 



Pentadecane, 



Hexadecane, 



Heptadecane, 



Octadecane, 



Nonadecane, 



Eicosane, 



Heneicosane, 



Docosane, 



Tricosane, 



Tetracosane, 



Heptacosane, 



Hentriaeontane, 



Dotriacontane, 



Pentatriacontane 



C 12 H 2G- 



C 13 H 28 . 

 C 13 H 32 . 



Ci 9 H 40 . 

 O 20 H 42 . 

 C 21 H 44 . 



C 22 H 46 . 



C 2T H 3 S 



^32^60 



68 | 201-4 | 

 74 j 219-9 

 80 237-3 l 

 86 I 255-4 I 

 92 273-2 

 291-2 

 309-0 

 326-9 

 3447 

 362-5 

 380-3 

 398-3 

 416-2 

 434-1 

 487-4 

 558-4 

 194 I 5762 

 212 ! 629-5 



104 

 110 

 116 

 122 

 128 

 134 

 140 

 146 

 164 

 188 



18-5 

 17-4 

 18-1 

 17-8 

 18-0 

 17-8 

 17-9 

 17-8 

 17-8 

 17-8 

 180 

 17-9 

 17-9 

 3xl7'8 

 4x17-75 

 17-8 

 3x178 



•527 



2-962 1 



•526 



2-971 | 



•524 



2-966 



1-520 



2-970 



1-520 



2970 



1-519 



2-971 



>-513 



2-971 



)-512 



2-972 



)-506 



2-971 



... 



2-971 





2-971 





2-972 





2971 





2-973 





2-972 





I 2 970 





2-970 





2-969 



201-96 



219-78 



237-60 



255-42 



273-24 



291-06 



308-88 



326-70 



344-52 



362-34 



380-]6 



398-00 



415-8 



433-62 



487-08 



558-36 



576-18 



629-64 



Mean values 



17-83 

 :6x 2-971 



2-970 



The volumes of the above hydrocarbons are seen to be 

 proportional to the volume of combined hydrogen which 

 = 2-970 ; that of carbon = 4 X 2*970 = 11-88. The volume 



