Latent Beat, and Compressibility. 



29 





axis) ; the lower curve represents the variation of € with 

 temperature. In the case of nitrobenzene, the two curves 

 touch at 0°C, at which temperature those for ethyl iodide 

 are also very close. With ethyl iodide and acetate, chloro- 

 form and ether, the 6 curve touches the — 2 axis in the 

 neighbourhood of the boiling-points. 



- 





^^ ETHER 



^^^ CHCi , ^* ..-• 

 ^^*^ ^..~-^7* ETHYL ACETATE 



^^•"^^^^^ ■•-*■ ..''•"'' 



m ^.*r~" 



" 



- 





- ..*"'' 



« * 





« — 



j, ETHYL /OO/DE 













••••• 



•-•"* ~Ji.'^^^ =JfJ ^ J N/TffO BENZENE 







v°" 









^ •• "~ 



'•'•■^<%~r^P - -^. N/TftO BENZENE 









i 1 1.1 II ! 1 1 1 



"" 



30 



Temperature. 



It would thus appear that from (roughly) the boiling- 

 point downwards it becomes progressively necessary to 

 regard " a " as a function of the volume. 



Latent Heat and Heat of Expansion. 



It will be noticed that at 0° C. the value of e is roughly 

 — 3 (mean value for the liquids dealt with is — 2*94, ex- 

 cluding ether). In other words, at 0° C. we have 



1 



£J 



— 3Xi5 approximately, 



or 



#J 



-3\i. 



