Thermodynamic Properties of Cyclohexane

Temperature Pressure Density Volume Int. energy Enthalpy Entropy C, CF Sound speed Joule-Thomson 

The values in these tables were generated from the NIST REFPROP software (Lemmon, E. W., McLinden, M. O., and Huber, M. L.s NIST Standard Reference Database 23 Reference Fluid Thermodynamic and Transport Properties—REFPROP, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg, Md., 2002, Version 7.1). The primary source for the thermodynamic properties is Penoncello, S. G., Goodwin, A. R. H., and Jacobsen, R. T., A Thermodynamic Property Formulation for Cyclohexane, Int. J. Thermophys. 16(2) 519-531,1995. Validated equations for the viscosity and thermal conductivity are not currently available for this fluid. 

The uncertainties of the equation of state are 0.1% in density, 2% in heat capacity, and 1% in the speed of sound, except in the critical region. 

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Carmona, F.J., Gonzalez, J.A., Carcia de la Fuente, I., Cobos, J.C., Bhethanabotla, V.R., Campbell, S.W. (2000) Thermodynamic properties of n-alkoxyethanols + organic solvent mixtures. XI. Total vapor pressure measurements for n-hexane, cyclohexane or n-hcptanc + 2-ethoxyethanol at 303.15 and 323.15 K. J. Chem. Eng. Data 45, 699-703. 

The excess thermodynamic properties for (cyclohexane + hexane) were obtained from the following sources Excess enthalpies come from K. N. Marsh and R. H. Stokes, Enthalpies of Mixing of n-Hexane + Cyclohexane at 25 °C , J. Chem. Thermodyn., 1, 223-225 (1969) and M. B. Ewing and K. N. Marsh, The Enthalpy of Mixing of n-Hexane + Cyclohexane at... 

S. Cabani and N. Ceccanti, Thermodynamic Properties of Binary Mixtures of Cyclohexane with Cyclic Amines or Cyclic Ethers at 298.15 K , J. Chem. Thermodyn., 5, 9-20 (1973) ... 

The (liquid 4- liquid) equilibria diagram for (cyclohexane + methanol) was taken from D. C. Jones and S. Amstell, The Critical Solution Temperature of the System Methyl Alcohol-Cyclohexane as a Means of Detecting and Estimating Water in Methyl Alcohol , J. Chem. Soc., 1930, 1316-1323 (1930). The G results were calculated from the (vapor 4- liquid) results of K. Strubl, V. Svoboda, R. Holub, and J. Pick, Liquid-Vapour Equilibrium. XIV. Isothermal Equilibrium and Calculation of Excess Functions in the Systems Methanol -Cyclohexane and Cyclohexane-Propanol , Collect. Czech. Chem. Commun., 35, 3004-3019 (1970). The results are from M. Dai and J.-P.Chao, Studies on Thermodynamic Properties of Binary Systems Containing Alcohols. II. Excess Enthalpies of C to C5 Normal Alcohols + 1,4-Dioxane , Fluid Phase Equilib., 23, 321-326 (1985). 

Gaw, W. J. Swinfon, F. L. Thermodynamic properties of binary systems containing hexafluorobenzene. Part 3. Excess Gibbs free energy of the system hexafluorobenzene + cyclohexane. Trans. Faraday Soc. 1968, 64, 637-647. 

Yoneda, Y. (1979). An Estimation of the Thermodynamic Properties of Organic Compounds in the Ideal Gas State. I. Acyclic Compounds and Cyclic Compounds with a Ring of Cyclopentane, Cyclohexane, Benzene or Naphthalene. Bull.Chem.Soc.Jap., 52,1297-1314. 

At the point C the two liquid layers become identical, and this is called the critical solution point or con-solute point. If the total applied pressure is varied, both the critical temperature and composition of the critical mixture alter and we obtain a critical solution line. As an example of this we give in table 16. If the dependence of the critical solution temperature on pressure for the system cyclohexane -f aniline. An increase of pressure raises the critical solution temperature, and the mutual solubility of the two substances is decreased. We saw earlier that the applied pressure had only a small effect on the thermodynamic properties of condensed phases, and we notice in this case that an increase of pressure of 250 atm. alters the critical temperature by only 1.6 °C. 

THERMODYNAMIC PROPERTIES OF N-PROPYU N-BUTYL, AND N-DECYL-SUBSTITUTED CYCLOHEXANE FROM 10 TO 370 K. 

Thermodynamic properties of (n-alkoxyethanols + organic solvents). Xll. Tofed vapour pressure measurements for (n-hexane, n-heptane or cyclohexane -1- 2-methoxyethanol) at different temperatures J. Chem. Thermodyn. 2001,33,47-59... 

Kaivamo, T. Nissema, A. Karvo, M. Thermodynamic properties of binary and ternary systems. XIII. Vapor pressures of the system dimethyl sulfoxide + cyclohexane -l- p-xylene Oulim Yliopiston Kent. Laitoksen Raporttisar. 1983, (13), 1-9... 

Cabani, S. Ceccanti, N. Thermodynamic properties of binary mixtures of cyclohexane with cychc amines or cychc ethers J. Chem. Thermodyn. 1973,5, 9-20... 

The two monomers of major interest, styrene and ethylene, are well known and details can be found on all aspects of their technology elsewhere. Poly(ethylene-co-styrene) is primarily produced via solution polymerization techniques using metallocene catalyst/co-catalyst systems, analogous to the production of copolymers of ethylene with a-olefin monomers. Solvents that can be employed include ethyl-benzene, toluene, cyclohexane, and mixed alkanes (such as ISO PAR E, available from Exxon). The thermodynamic properties of poly(ethylene-co-styrene), including solvent interactions and solubility parameter assessments, are important factors in relation to polymer manufacture and processing, and have been reported by Hamedi and co-workers (41). 

Figure 25.26 Liquid-vapor equilibria for mixtures of acetone in cyclohexane. Source WE Acree Jr, Thermodynamic Properties of Nonelectrolyte Solutions, Academic Press, Orlando, 1984. From KVK Rao and CV Rao, Chem Eng Sci 7, 97 (1957).

Takigawa, T. Ohba, M. Ogawa, H. Murakami, S. Thermodynamic properties of binary mixtures of hexane isomer and cyclohexane at 298.15 K Fluid Phase Equilib. 2003,204 119-130... 

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