Soc., 1973, 95, 790-792. mol). Predict Chemical & Physical Properties Watson's equation has achieved wide acceptance and is simple and reliable. Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. This indicates energy is absorbed by the system to get the molecules into the gas state. with the development of data collections included in Solution Wanted Eng. Phys., 1961, 34, 189. Zaved., Khim. RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron, Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Mass spectrum (electron ionization), References, Notes, Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson, Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director, Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, References, Notes. Khim. Thermal data on organic compounds. Excited states of neutral molecular fragments from appearance potentials by electron impact in a mass spectrometer, Trans. Finke, H.L. LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi SRD 103b – Thermo Data Engine (TDE) for pure compounds, J. Res. [all data], Rogers and Siddiqui, 1975 What is its molar heat of vaporization in kilojoules per mole if its vapor pressure at 20°C is 11 torr? [all data], Czarnota, 1993 Can. Messerly J.F., Data, 1973, 18, 2, 115-126, https://doi.org/10.1021/je60057a009 ; Costas, M.; Patterson, D., Chem. Chem. J. Chem. . Majer, Vladimír; Svoboda, Václav; Hála, Slavoj; Pick, Jirí, ; D'Arcy, P.J., ; Inghram, M.G., Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J. Specific heat and related properties, Phys., 1970, 52, 6348. Majer, V.; Svoboda, V., Octane: C8H18 (l)-226.61-249.73 ± 0.79: kJ/mol: 114.2285 ± 0.0065: 111-65-9*500 errors or omissions in the Database. n-Octane; Sources. Collect. ; Lacey, W.N., Found a problem? Zaved., Excess molar heat capacity and excess molar volume of 1,6-dichlorohexane + n-octane, Heats of hydrogenation Part 1.-Dodeca-3:9 and -5:7 Diynes, Potzinger, P.; Bunau, G.v., The vapour pressures of n-octane determined using comparative ebulliometry, Eng. A linear molar octane blending model was found to describe most of the nonlinearity in the RON and MON data, but measured values were still somewhat greater than predicted. 1.) following TRC products: Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes, Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein. log10(P) = A − (B / (T + C)) This integrated form of the Clausius-Clapeyron relation can be used to provide a good approximation of the heat of vaporization for many pure liquids:[5][6], The primary Clausius-Clapeyron equation is exact. Vyssh. form is
J. Chem. Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Temperature dependence of heats of vaporization of saturated hydrocarbons C5-C8; Experimental data and an estimation method, Mautner(Meot-Ner), M.; Sieck, L.W. J. Res. Phys. [all data], Potzinger and Bunau, 1969 X. Chem. n-Hexane, methylcyclopentane, and n-octane, ; Taylor, W.J. View plot The ∆S vap for iso-octane 97.8 J/mol∙K was computed from the literature. Lainez, A.; Grolier, J.-P.E. J. Data compiled as indicated in comments: The heat of vaporization is not a constant. of all reactions involving this species. Thermodynamic calculation of the equilibrium composition of isomeric octenes in dehydrogenation of n-octane, Standard Reference Data Act. reaction search pages in place of the enumerated reaction
the J. [all data], McKay and Sage, 1960 ; Pignocco, J.M. and HTML 5 enabled browser. This is particularly true of metals, which often form covalently bonded molecules in the gas phase: in these cases, the enthalpy of atomization must be used to obtain a true value of the bond energy. Fluid Phase Equilibria, 2003, 210, 2, 277-285, https://doi.org/10.1016/S0378-3812(03)00174-2 Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data], Flitcroft, Skinner, et al., 1957 binary mixtures and chemical reactions, SRSD 2 – Web Thermo Tables (WTT), "lite" edition, SRSD 3 – Web Thermo Tables (WTT), professional edition, SRD 156 – Clathrate Hydrate Physical Property Database, Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein, Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson, liquid; Bruker Tensor 27 FTIR; 0.48212986 cm, NIST Mass Spectrometry Data Center, William E. Wallace, director, Modified by NIST for use in this application, https://doi.org/10.1016/S0378-3812(03)00174-2, https://doi.org/10.1007/978-94-009-3173-2, https://doi.org/10.1016/0040-6031(86)85073-0, https://doi.org/10.1016/0040-6031(84)85009-1, This reference does not contain the original experimental data. DRB - Donald R. Burgess, Jr. ; Inglese, A.; Roux, A.H.; Wilhelm, E., Heat of Formation Definition - Chemistry Glossary, Enthalpy Definition in Chemistry and Physics, Activation Energy Definition in Chemistry, Enthalpy of Atomization Definition (Chemistry), Heat of Fusion Example Problem: Melting Ice, Covalent or Molecular Compound Properties, Heat of Formation Table for Common Compounds, Electron Affinity Definition in Chemistry, How to Solve an Energy From Wavelength Problem, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. [all data], Turner, Jarrett, et al., 1973 intended to imply recommendation or endorsement by the National SRD 103a – Thermo Data Engine (TDE) for pure compounds. Trejo, L.M. J. Chem. . [all data], Shakirov and Lyubarskii, 1980 ; Costas, M., Spectrom. Neft Gaz 18, 1975, No.10, 63-66. ΔvapH = Revised thermodynamic functions for the n-alkanes, C5-C18, Pressions de vapeur et enthalpies libres d'exces de systemes binaires: Hexamethylphosphorotriamide (HMPT) + n-hexane; n-heptane; n-octane: A 298,15 K; 303,15 K; 313,15 K; 323,15 K; 333,15 K, J. Res. Volume III, . Ucheb. [all data], Grolier, Inglese, et al., 1981 As an example of using the Clausius-Clapeyron equation, given that the vapor pressure of benzene is 1 atm at 353 K and 2 atm at 377 K, benzene's heat of vaporization is obtained as 32,390 J/mol within that temperature range. Neft i Gaz, 1984, (2), 60-62. Alkanes and chloro-, bromo- and iodoalkanes, The references used may be made clearer with a different or consistent style of citation and footnoting. [all data], Carruth and Kobayashi, 1973 Data, 1960, 5, 1, 21-24, https://doi.org/10.1021/je60005a005 Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Heats of hydrogenation by a simple and rapid flow calorimetric method, ; Taylor, W.J. Calculate the energy in joules necessary to vaporize 83.7 g octane at its boiling point.. . [all data], Williamham, Taylor, et al., 1945 These two definitions are equivalent: the boiling point is the temperature at which the increased entropy of the gas phase overcomes the intermolecular forces. However, NIST makes no warranties to that effect, and NIST Sicher, J.; Svoboda, M.; Zavada, J.; Turner, R.B. Stand. NBS, 1947, 39, 453-477. . [all data], Tardajos, Aicart, et al., 1986 Δ f H° gas: Enthalpy of formation at standard conditions (kJ/mol). is always positive), and from. [all data], Scott D.W., 1974, 2 DH - Eugene S. Domalski and Elizabeth D. Hearing, Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes, Data compiled as indicated in comments: