Excess enthalpies of mixtures of pentafluorobenzene with some mono-alkyl benzenes

Excess enthalpies H E of mixtures of pentafluorobenzene with ethylbenzene, n -propylbenzene, iso-propylbenzene, n -butylbenzene, t -butylbenzene, and n -pentylbenzene have been measured in the temperature range 298 to 328 K. A correlation between H E and the number of carbon atoms in the alkyl side chain is pointed out in the discussion.