VAPOR-PRESSURES OF METHYL, ETHYL, NORMAL-PROPYL, ISOBUTYL, AND NORMAL-BUTYL BENZOATES AT REDUCED PRESSURES

The vapor pressures of methyl, ethyl, n-propyl, isobutyl, and n-butyl benzoates were measured over the pressure range of 0. 50-30 kPa. The results were examined by fitting with a Chebyshev polynomial and with Miller, Florst-Kalkwarf, and Antoine equations. The percent root mean square deviations of pressures of these five benzoates for the Miller fit were 0. 30, 0. 30, 0. 25, 0. 16, and 0. 24, respectively. The enthalpies of vaporization of the benzoates were also obtained by using a Chebyshev polynomial with mean errors of plus or minus 0. 2 kJ/mol.