Density of Some 1-Chloroalkanes within the Temperature Range from (253.15 to 423.15) K Mikhail F. Bolotnikov,* Yurij A. Neruchev, and Olga S. Ryshkova Department of General Physic, Laboratory of Molecular Acoustic, Kursk State University, Kursk, Radishcheva 33, Russia The densities of 1-chlorobutane, 1-chloropentane, 1-chloroheptane, 1-chlorooctane, 1-chlorodecane, and 1-chlo- rotetradecane have been measured within the temperature range from (253.15 to 423.15) K. The experimental results were used to calculate the isobaric thermal expansion coefficient R p . Introduction The density is one of the most often-quoted properties of a substance, and its meaning is often required for prediction of the other properties of the one. Experimental liquid densities of pure hydrocarbons and their mixtures are needed for the design of chemical processes. Therefore, experimental measure- ments are needed to understand the fundamental behavior of this property and then to develop new models of condensed substances. This work is a part of the project of the Molecular Acoustic Laboratory to investigate thermophysical properties of mono- haloalkanes and their binary mixtures. In this work, we report the densities of some 1-chloroalkanes as a function of temper- ature at atmospheric pressure. Scientific and technical interests in these substances arise from their diverse applications and extensive use in practice. They are used in the petroleum, pharmaceutical, paint and varnish, textile, and paper industries, for the preparation of polymeric materials, and in many other fields. That is why representative international conferences on the thermochemical, thermodynamic, and transport properties of halogenated hydrocarbons and their mixtures were held in recent years in Pisa (Italy, 1999), Paris (France, 2001), and Rostock (Germany, 2002) under the auspices of IUPAC. In our earlier work, 1-5 we have determined the speed of sound, density, relative permittivity, viscosity, and heat capacity of some 1-haloalkanes and their binary mixtures with n-alkanes. New measurements have been made for the density of 1-chlo- robutane, 1-chloropentane, 1-chloroheptane, 1-chlorooctane, 1-chlorodecane, and 1-chlorotetradecane at temperature range from (253.15 to 423.15) K. Experimental Section Materials. The materials used in this study, 1-chlorobutane (1-ChlBu), 1-chloropentane (1-ChlPe), 1-chloroheptane (1- ChlHp), 1-chlorooctane (1-ChlOc), 1-chlorodecane (1-ChlDe), and 1-chlorotetradecane (1-ChlTetrade) (with a mole fraction purity of 0.999, 0.998, 0.999, 0.984, and 0.986, respectively) were supplied by Acros Organics. 1-Chloroheptane (1-ChlHp) with a mole fraction purity of 0.998 was obtained from Sigma- Aldrich. Measurements. Density measurements were carried out using a 52.4890 cm 3 (at 298.15 K) pycnometer. The mass of the pycnometer was measured, using an analytical balance with an uncertainty of ( 3‚10 -4 g. The pycnometer was calibrated with bidistilled water and other liquids (high n-alkanes). The position of the liquid level in the pycnometer was recorded with the traveling microscope, which could be read to ( 0.01 mm. A refrigerated thermostat (Kriovist, Termex Russia) was used to thermostat the pycnometer from (253.15 to 313.15) K. For measurements of liquid density from (323.15 to 423.15) K, a * Author to whom correspondence should be addressed. E-mail: bolotnikov@mail.ru. Table 1. Experimental Values of Density G of Liquid 1-Chlorobutane, 1-Chloropentane, 1-Chloroheptane, 1-Chlorooctane, 1-Chlorodecane, and 1-Chlorotetradecane at Various Temperatures F/(kg‚m -3 ) T/K 1-ChlBu 1-ChlPe 1-ChlHp 1-ChlOc 1-ChlDe 1-ChlTetrade 253.15 925.8 917.5 908.3 905.5 899.9 263.15 917.4 910.2 900.4 897.1 892.3 273.15 907.3 900.7 891.7 889.0 884.2 283.15 896.6 891.0 883.4 880.6 876.8 288.15 868.5 293.15 885.9 881.3 874.5 872.3 868.9 864.9 298.15 880.4 876.2 870.4 868.3 865.0 861.0 303.15 874.9 857.5 313.15 863. 9 323.15 852.1 851.3 847.4 845.6 843.3 323.65 848.2 338.15 835.3 343.15 830.6 830.6 830.5 830.0 829.0 363.15 809.1 812.6 813.2 814.2 814.3 393.15 784.4 786.8 789.5 792.5 423.15 764.6 770.1 Table 2. Values of the Parameters of Equation 1 for Density G and Standard Deviation σ for 1-Chloroalkanes from (243.15 to 423.15) K liquid A0 A1 A2 σ 1-chlorobutane 1077.96 -0.2397 -1.4165‚10 -3 0.47 1-chloropentane 1077.88 -0.3761 -1.0037‚10 -3 0.54 1-chloroheptane 1088.04 -0.5967 -4.4660‚10 -4 0.16 1-chlorooctane 1093.64 -0.6788 -2.5822‚10 -4 0.14 1-chlorodecane 1076.03 -0.6393 -2.2752‚10 -4 0.17 1-chlorotetradecane 1063.57 -0.6431 -1.1905‚10 -4 0.15 Figure 1. Deviation of literature density F of 1-chlorobutane from eq 1 as a function of temperature: Δ, this work; 0, ref 7; 2, ref 8; ×, ref 9; *, ref 29; b , ref 11; s, ref 13, ref 14; -, ref 15; 9, ref 16; ], ref 12, ref 17; +, ref 18, ref 19; -, ref 20. 2514 J. Chem. Eng. Data 2007, 52, 2514-2516 10.1021/je700325c CCC: $37.00 © 2007 American Chemical Society Published on Web 10/13/2007