«644 Sir J. A. Ewing on Specific Heat of Saturated Vapour 

 Fig. 5. — Ethyl Propionate. 









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1 



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1 











1 



1 

 1 











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 1 



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0-2 0-3 0-4 0-5 



£ntropy 



Two other substances in Young's list present points of 

 interest. His values of L for Carbon Tetrachloride extend 

 from 70° up to the critical point. Below that we have 

 Regnault's measurements of the total heat of formation, 

 from which L is readily found as in the ease of benzene. 

 For the specific heat we have Regnault's formula * 



0-1980 + 0-0001812 t, 



from which 



^=0-3419 log 10 T + 0-0001812 T-0'8826. 

 Combining these data we obtain : — 



* Relation des Experiences, vol. ii. p. 282. 



