534 



Albert P. Mathews 



4 (Continued) 

 Isopentane Methyl butyrate 



Heptane 



Ether 



Methyl isobutyrate 



Carbon tetrachloride 



It is of interest to see how large the amount of heat (I) 

 is which is absorbed intramolecularly on passing from liquid 

 to vapor. Table 5 contains the calculations for I of i gram 

 of hexane. I = I, E a(i/Vj -- i/V w ) gram calories. 



