(p, ρ, T) Behavior for the Binary Mixtures Carbon Dioxide plus Heptane and Carbon Dioxide plus Tridecane

The aim of this work is to report the (p, rho, T) properties for the carbon dioxide (x) + heptane (1 - x) and carbon dioxide (x) + tridecane (1 - x) from 313 K to 363 K. Experimental densities were obtained by measuring the vibrating period of each mixture in a commercial vibrating tube densimeter. Binary mixtures were initially synthesized at compositions of x = (0.0218, 0.3148, 0.5085, 0.7514, 0.9496) and x = (0.0955, 0.2526, 0.5259, 0.7549, 0.8978) for mixtures containing heptane and tridecane, respectively. Excess molar volumes are negative for the whole range of compositions. Experimental densities are well represented (within experimental uncertainty) through the Benedict-Webb-Rubin-Starling equation of state, and both 5-, and 6-parameters correlations. Derived thermodynamic properties were computed using the 5-parameter equation.