340 



Intelligence and Miscellaneous Articles, 



MECHANICAL ENERGY OF MOLECULES OF GASES. 



To the Editors of the Philosophical Magazine. 

 Gentlemen, 



Will you kindly allow me to ask, through the medium of your 

 8 Philosophical Magazine,' whether there has ever been published a 

 statement of the Amounts of Mechanical Energy of the Molecules 

 of different Gases ? and if so, where it is to be found ? 



If there has been no such publication, I beg leave to say that by 

 calculating the mean molecular velocities per second at 0° C. of a 

 considerable number of gases, simple and compound, from their 

 molecular weights and the square roots of those weights (or of the 

 specific gravities) in the usual manner, and multiplying the squares 

 of those velocities by the molecular weights, I have observed that 

 the resulting products are alike in amount, and therefore the 

 quantities of mechanical energy of the molecules of gases at the same 

 temperature and pressure are equal. 



As it is possible that this general truth has been already 

 observed and published (although during extensive reading on 

 cognate subjects I have not seen it), I make the above statement 

 with great diffidence . 



I remain, 



Tours truly, 



Birmingham, Feb. 22, 1894. Geoege Goee. 



Gas. 



Sp. gr., 



or half 



molecular 



weight. 



Square root 

 of sp. gr. 



Metres 



per second 



at 0° C. 



Sqaare of 



Molecular 



Velocity. 



Amount of 



Mechanical 



Energy. 



H 



L-0 

 90 



120 

 14-0 

 14-0 

 160 

 190 

 22-0 

 220 

 32-0 

 33-8 

 35-5 

 36-5 

 43-5 

 560 

 62-0 

 79-5 

 80-0 

 1000 

 1270 

 129-0 

 150 



100 

 300 

 3-464 

 3-74 

 3-74 

 4-00 

 4-358 

 4-69 

 4-69 

 5-656 

 5-813 

 5-96 

 604 

 6-595 

 7-483 

 7-874 

 8-916 

 8-938 

 1000 

 11-27 

 11-357 

 12-247 



1842-6 

 614-2 

 531-92 

 492-67 

 492-67 

 460-65 

 422-617 

 392-87 

 392-87 

 325-95 

 316-98 

 30916 

 305-06 

 279-39 

 246-238 

 234-01 

 206-66 

 206-15 

 184-26 

 163-495 

 162-24 

 150-45 



3397175 



377242 



282939 



242724 



242724 



212198 



178627 



154346 



154346 



106243 



100476 



95580 



93062 



78059 



60634 



54760 



42708 



42498 



33951 



26732 



26322 



22635 



3397175 

 3395175 

 3395268 

 3398136 

 3398136 

 3395168 

 3393913 

 3395612 

 3395612 

 3399789 

 3396099 

 3393090 

 3396763 

 3395566 

 3395504 

 3395162 

 3395286 

 3399840 

 3395174 

 3394964 

 3395538 

 3395280 



H 2 



N0 2 .... 

 N 



00 







F 



C0 2 



N 2 



s 



C10 2 



CI 



HC1 

 C1 2 

 Cd 



P 



Se 



Br 



Hg 



I 



Te 



As 





