Critical Evaluation: Naphthalene with n-Hexane (IUPAC SDS Volume 59)
Naphthalene solubilities in n-hexane were retrieved from papers by Domanska (1), Ward (2), Acree et al. (3), Heric and Posey (4), and Chang (5). The first two studies report values at several temperatures, Acree et al. determined values at 303, 308 and 313 K, and both Heric and Posey and Chang measured only the mole fraction solubility at 298 K. There is no prior reason to exclude any of the five studies from the critical evaluation.
Regressional analysis of the experimental data as Ln x1 versus 1/T yielded the following mathematical relationship: Ln x1 = - 3849.6 (1/T) + 10.789 (r=0.9964) for variation of naphthalene solubility with absolute temperature (see graph below).
References:

1 Chang, W.; Ph.D Dissertation, North Dakota State University, ND, 1969.
2 Domanska, U.; Pol. J. Chem. 1981, 55, 1715-1720.
3 Ward, H. L.; J. Phys. Chem. 1926, 30, 1316-1333.
4 Acree Jr., W. E.; Pontikos, N. M.; Judy, C. L.; Int. J. Pharm. 1986, 31, 225-230.
5 Heric, E. L.; Posey, C. D.; J. Chem. Eng. Data 1964, 9, 35-43.