Surface Tension of 2,2-Dimethylbutane from (233 to 378) K

Abstract

The surface tension of 2,2-dimethylbutane was measured at temperatures from (233 to 378) K with a differential capillary rise method, together with the surface tension of heptane measured at temperatures from (303 to 358) K for verifying the experimental apparatus. The uncertainty of temperature is less than ( 10 mK. The uncertainty for surface tension was estimated to be within ( 0.2 mN • m -1 . The surface tension results were correlated as a function of temperature with an average absolute deviation of 0.049 mN • m -1 for 2,2-dimethylbutane.

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

“…The estimated uncertainty of the liquid phase is 2 % along saturation over the temperature range 257 K to 321 K, 5 % for the gas phase, and larger in the critical region and at pressures above saturation. Surface tension data from Wibaut et al (Wibaut, 1939) and Gao et al (W. Z. Gao, X.; were fit to obtain the coefficients in Table 5. The estimated uncertainty is 2.5 % over the temperature range 230 K to 380 K, due to the stated uncertainty of 2.5 % for the highest temperatures for the data of Gao et al (W. Z. Gao, X.; Figure 16 shows the deviations of the model from the surface tension data.…”

“…Surface tension data from Wibaut et al (Wibaut, 1939) and Gao et al (W. Z. Gao, X.; were fit to obtain the coefficients in Table 5. The estimated uncertainty is 2.5 % over the temperature range 230 K to 380 K, due to the stated uncertainty of 2.5 % for the highest temperatures for the data of Gao et al (W. Z. Gao, X.; Figure 16 shows the deviations of the model from the surface tension data. ______________________________________________________________________________________________________ …”

Group contribution method: Surface tension of linear and branched alkanes

“…It is a compound with well-known properties, therefore a large amount of data on the surface tension has been found in literature. Although the methods of measurement are different (capillary rise method [65,66], pendant drop method [59], Wilhelmy plate/Du Nouy ring [60]), the obtained surface tension values at the same temperatures are practically the same. It can be seen that the proposed GCM method (Fig.…”

“…Its density is low (r ¼ 0.64 g cm À3 at 25 C). Only one set of experimental data on surface tension at various temperatures, obtained by capillary rise method, was found in literature [66], the other data shown in Fig. 4 were found either in data compilations [28,66] (no details mentioned) or they were obtained by theoretical calculation (correlation between topological features and surface tension) [67].…”

“…Only one set of experimental data on surface tension at various temperatures, obtained by capillary rise method, was found in literature [66], the other data shown in Fig. 4 were found either in data compilations [28,66] (no details mentioned) or they were obtained by theoretical calculation (correlation between topological features and surface tension) [67]. The boiling point of 2,2-dimethylbutane is 322.85 K [69], consequently the surface tension data in TRC Tables [50] and those in this work range only to 313.15 K. However, the data, presented in Ref.…”