PvT Properties, Saturation Pressures, Saturated Densities, and Critical Parameters of Trifluoroiodomethane (CF3I; R-13I1)

Measurements of PvT properties, saturated pressures, saturated densities, and critical parameters were carried out for R-13I1 (trifluoroiodomethane; CF3I). Forty-seven PvT property data in the one-phase region along seven isochores for R-13I1 were obtained in the temperatures between 310 and 405 K, pressures up to 6392 kPa, and densities between 48 and 1784 kg.m(-3) using the isochoric method. Thirty-seven saturation pressure data for R-13I1 were obtained in the temperatures between 240 K and the critical temperature and pressures between 58 kPa and the critical pressure. Twenty-six saturated density data for R-13I1 were obtained by the observation of meniscus disappearance and the inflection points of the isochore in the densities between 48 and 1784 kg.m(-3). On the basis of these measurements, the critical temperature, critical density (critical molar volume), and critical pressure of R-13I1 were determined as T-c = 396.495 +/- 0.010 K (with a coverage factor, k = 2), rho(c) = 865 +/- 5 kg.m(-3) (v(c) = 226.5 +/- 1.3 cm(3).mol(-1)) (bracketed interval), and P-c = 3971 +/- 3 kPa (with a coverage factor, k = 2), respectively. Moreover, a correlation for the saturation pressure and correlations for the vapor liquid coexistence curve were established by optimization techniques.