Molecules of ethanoic acid (acetic acid) dimerise in
benzene due to hydrogen bonding This normally happens
in solvents of low dielectric constant In this case the number
of particles is reduced due to dimerisation Association of
molecules is depicted as follows:
It can be undoubtedly stated here that if all the molecules of ethanoic
acid associate in benzene, then DTb or DTf for ethanoic acid will be half
of the normal value