some Thermodynamical Relations. 

 Dissociating Substances. 



47 



Five of these bodies have been examined, three liquid and 

 two solid. In all of them the value of c is constant, while in 

 the case of nitrogen peroxide, when compared with water it 

 is = 0, or at any rate it is a very small number. 



18. Nitrogen Peroxide and Water. 

 as correct. c = 0. 



H 2 0' 



Water taken 



Pressures. 



Ratios. 



Absolute temperatures 

 ofN 3 CV 



From observed 

 temperatures. 



Smoothed. 



Recalculated. 



Observed. 



millim. 

 100 

 150 

 200 

 300 

 400 

 500 



0-7884 

 0-7899 

 0-7895 

 0-7908 

 0-7904 

 0-7904 



0-790 



256-5 



26315 



268-3 



275-6 



281-25 



285-75 



256-0 

 2631 

 268-1 

 275-9 

 281-4 

 285-9 



Considering the nature of the substance, these differences 

 may probably be considered within the limits of experimental 

 error. 



19. Chloral Ethyl -alcoholate and Water. 



CC1.CH 



{ 



OH 

 0C 2 H 



5. 



H 2 

 Temperatures of water taken as correct. c= —'0005119. 



Pressures. 



Ratios. 



Absolute temperatures of 

 Chloral Ethyl-alcoholate. 



From observed 

 temperatures. 



Smoothed. 



Recalculated. 



Observed. 



millim. 

 50 

 100 

 150 

 200 

 300 

 400 

 500 



1-0729 

 10659 

 1-0619 

 1-0545 

 10530 

 10500 

 10470 



10728 

 10659 

 1-0615 

 1-0582 

 10535 

 10499 

 10470 



334-0 

 346-1 

 3536 

 359-4 

 367-6 

 373-8 

 378-7 



3340 

 3461 

 353-7 

 3581 

 367-4 

 373-8 

 378-7 



