Dichlorodifluoromethane

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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas-491.62kJ/molReviewChase, 1998Data last reviewed in June, 1970
Δfgas-477.6 ± 5.6kJ/molCmKolesov, Zenkov, et al., 1963Reanalyzed by Cox and Pilcher, 1970, Original value = -469.0 ± 5.0 kJ/mol; Reaction with Na; ALS
Δfgas-477. ± 13.kJ/molCcbWartenberg and Schiefer, 1955Reanalyzed by Cox and Pilcher, 1970, Original value = -473. kJ/mol; ALS
Δfgas-469. ± 8.kJ/molCmKirkbride and Davidson, 1954Von Wartenberg method; ALS
Quantity Value Units Method Reference Comment
gas,1 bar300.89J/mol*KReviewChase, 1998Data last reviewed in June, 1970

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 1100.1100. to 6000.
A 48.01014107.3635
B 139.18080.404844
C -124.3326-0.082033
D 39.751470.005689
E -0.633834-5.707394
F -513.2304-539.7486
G 319.1028406.4660
H -491.6200-491.6200
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1970 Data last reviewed in June, 1970

Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
126.8290.Buffington and Fleischer, 1931Heat capacity measured at 230 K and 290 K using two different methods. Cp at 230 K is 106.3 J/mol*K.

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil243.3KN/APCR Inc., 1990BS
Tboil243.KN/AKrauss and Stephan, 1989Uncertainty assigned by TRC = 1.5 K; TRC
Tboil243.4KN/AStreng, 1971Uncertainty assigned by TRC = 0.3 K; TRC
Tboil242.KN/AAwbery and Griffiths, 1936Uncertainty assigned by TRC = 5. K; TRC
Tboil245.35KN/AThornton, Burg, et al., 1933Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Tfus115.2KN/AStreng, 1971Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Ttriple116.100KN/ABlanke and Weiss, 1991Uncertainty assigned by TRC = 0.01 K; on ITS-90; TRC
Ttriple115.15KN/AKrauss and Stephan, 1989Uncertainty assigned by TRC = 0.1 K; TRC
Ttriple390.35KN/AAltunin, Geller, et al., 1987Uncertainty assigned by TRC = 0.05 K; TRC
Quantity Value Units Method Reference Comment
Ptriple0.00010barN/ABlanke and Weiss, 1991Uncertainty assigned by TRC = 0.00006 bar; TRC
Quantity Value Units Method Reference Comment
Tc385.15KN/AKrauss and Stephan, 1989Uncertainty assigned by TRC = 0.3 K; TRC
Tc385.15KN/AAltunin, Geller, et al., 1987Uncertainty assigned by TRC = 0.2 K; TRC
Tc385.01KN/AOkada, Uematsu, et al., 1986Uncertainty assigned by TRC = 0.03 K; Tc selected from literature to correlate density meas.; TRC
Tc385.01KN/AHigashi, Okazaki, et al., 1984Uncertainty assigned by TRC = 0.05 K; TRC
Tc302.3KN/AMichels, Wassenaar, et al., 1966Uncertainty assigned by TRC = 0.06 K; TRC
Quantity Value Units Method Reference Comment
Pc41.31barN/AKrauss and Stephan, 1989Uncertainty assigned by TRC = 0.05 bar; TRC
Pc41.19barN/AAltunin, Geller, et al., 1987Uncertainty assigned by TRC = 0.20 bar; TRC
Pc41.29barN/AHigashi, Okazaki, et al., 1984Uncertainty assigned by TRC = 0.15 bar; TRC
Pc39.1115barN/AMichels, Wassenaar, et al., 1966Uncertainty assigned by TRC = 0.0607 bar; TRC
Quantity Value Units Method Reference Comment
ρc4.789mol/lN/AAltunin, Geller, et al., 1987Uncertainty assigned by TRC = 0.004 mol/l; TRC
ρc4.70mol/lN/AOkada, Uematsu, et al., 1986Uncertainty assigned by TRC = 0.0469 mol/l; Density measured with magnetic densimeter. Tc, Dc selected from literature to correlate density measurements. R12; TRC
ρc4.70mol/lN/AHigashi, Okazaki, et al., 1984Uncertainty assigned by TRC = 0.04 mol/l; TRC
ρc5.54mol/lN/AMichels, Wassenaar, et al., 1966Uncertainty assigned by TRC = 0.07 mol/l; TRC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
20.0297.AStephenson and Malanowski, 1987Based on data from 282. to 345. K.; AC
21.4229.AStephenson and Malanowski, 1987Based on data from 173. to 244. K.; AC
21.6225.AStephenson and Malanowski, 1987Based on data from 173. to 240. K.; AC
20.4270.AStephenson and Malanowski, 1987Based on data from 236. to 285. K.; AC
20.5356.AStephenson and Malanowski, 1987Based on data from 341. to 385. K.; AC
22.9187.N/AKudchadker, Kudchadker, et al., 1979Based on data from 172. to 279. K.; AC
21.5228.N/AStull, 1947Based on data from 154. to 243. K.; AC
20.4243.N/ABuffington and Fleischer, 1931AC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
154.7 to 243.43.81109782.072-37.773Stull, 1947Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Quantity Value Units Method Reference Comment
IE (evaluated)12.0 ± 0.2eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.40 ± 0.20NBIEDispert and Lacmann, 1978B

Ionization energy determinations

IE (eV) Method Reference Comment
12.26 ± 0.02PIKischlat and Morgner, 1985LBLHLM
11.87 ± 0.02PIWang and Leroi, 1983LBLHLM
11.75PIJochims, Lohr, et al., 1976LLK
11.75 ± 0.04PIAjello, Huntress, et al., 1976LLK
12.31 ± 0.05PIWatanabe, Nakayama, et al., 1962RDSH
11.7 ± 0.5EIBaker and Tate, 1938RDSH
12.24 ± 0.01PEJadrny, Karlsson, et al., 1977Vertical value; LLK
12.3PEDoucet, Sauvageau, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+22.?EIZayats, Perov, et al., 1985LBLHLM
C+26.5 ± 1.0?EIBaker and Tate, 1938RDSH
CCl+14.8 ± 0.2FCl+F(-)PISchenk, Oertel, et al., 1979LLK
CCl+17.0 ± 0.5?EIBaker and Tate, 1938RDSH
CFCl+10.60 ± 0.02Cl(-)PISchenk, Oertel, et al., 1979LLK
CFCl+15.2 ± 0.3F(-)+ClPISchenk, Oertel, et al., 1979LLK
CFCl+11.99ClEIAjello, Huntress, et al., 1976LLK
CFCl+17.76F(-)+ClPIAjello, Huntress, et al., 1976LLK
CFCl+18.1 ± 0.2F(-)+ClEIBaker and Tate, 1938RDSH
CF2Cl+12.55ClEILeyland, Majer, et al., 1970RDSH
CF2Cl+12.8 ± 0.2ClEIBaker and Tate, 1938RDSH
CFCl2+12.07 ± 0.05F(-)PISchenk, Oertel, et al., 1979LLK
CFCl2+13.30 ± 0.05FPISchenk, Oertel, et al., 1979LLK
CFCl2+14.15FPIJochims, Lohr, et al., 1976LLK
CFCl2+13.81FPIAjello, Huntress, et al., 1976LLK
CFCl2+15.4 ± 0.2FEIBaker and Tate, 1938RDSH
CF+15.3 ± 0.3Cl2+F(-)PISchenk, Oertel, et al., 1979LLK
CF+17.65F+Cl2PIJochims, Lohr, et al., 1976LLK
CF+20.20F+2ClPIJochims, Lohr, et al., 1976LLK
CF+19.5 ± 0.5?EIBaker and Tate, 1938RDSH
CF2+14.9 ± 0.3Cl2PISchenk, Oertel, et al., 1979LLK
CF2+17.222ClPIJochims, Lohr, et al., 1976LLK
CF2+16.982ClPIAjello, Huntress, et al., 1976LLK
CF2+18.1 ± 0.2?N/ABaker and Tate, 1938RDSH
Cl+16.?EIZayats, Perov, et al., 1985LBLHLM
Cl+16.4 ± 0.2CFCl2(-)PISchenk, Oertel, et al., 1979LLK
Cl+21.0 ± 0.2?EIBaker and Tate, 1938RDSH
Cl2+15.4 ± 0.1CF2PISchenk, Oertel, et al., 1979LLK
Cl2+16.7 ± 1.0?EIBaker and Tate, 1938RDSH
F+21.?EIZayats, Perov, et al., 1985LBLHLM
F+25.6 ± 0.2CF(-)+2ClPISchenk, Oertel, et al., 1979LLK
F+31.5 ± 0.5?EIBaker and Tate, 1938RDSH
F2+16.0 ± 1.0?EIBaker and Tate, 1938RDSH

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Kolesov, Zenkov, et al., 1963
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M., Standard enthalpies of formation of chlorotrifluoromethane and dichlorodifluoromethane, Russ. J. Phys. Chem. (Engl. Transl.), 1963, 37, 378-379. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Wartenberg and Schiefer, 1955
Wartenberg, H.V.; Schiefer, J., Bildungswarmen von fluor-chlor-kohlenstoff-verbindungen, Z. Anorg. Chem., 1955, 278, 326-332. [all data]

Kirkbride and Davidson, 1954
Kirkbride, F.W.; Davidson, F.G., Heats of formation of gaseous fluoro- and fluorochloro-carbons, Nature (London), 1954, 174, 79-80. [all data]

Buffington and Fleischer, 1931
Buffington, R.M.; Fleischer, J., Thermodynamic properties of dichlorodifluoromethane, a new refrigerant. IV. Specific heat of liquid and vapor and latent heat of vaporization, Ind. Eng. Chem., 1931, 23, 1290-1292. [all data]

PCR Inc., 1990
PCR Inc., Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]

Krauss and Stephan, 1989
Krauss, R.; Stephan, K., Thermal Conductivity of Refrigerants in a Wide Range of Temperature and Pressure, J. Phys. Chem. Ref. Data, 1989, 18, 43. [all data]

Streng, 1971
Streng, A.G., Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature, J. Chem. Eng. Data, 1971, 16, 357. [all data]

Awbery and Griffiths, 1936
Awbery, J.H.; Griffiths, E., The Viscosities of Some Liquid Refrigerants, Proc. Phys. Soc. London, 1936, 48, 372-80. [all data]

Thornton, Burg, et al., 1933
Thornton, N.V.; Burg, A.B.; Schlesinger, H.I., The Behaviour of Dichlorodifluoromethane and of Chlorotrifluoromethane in the Electric Discharge, J. Am. Chem. Soc., 1933, 55, 3177. [all data]

Blanke and Weiss, 1991
Blanke, W.; Weiss, R., Thermodynamic properties of refrigerants. Part I: the triple points of the refrigerants R11, R12, R22, R142b, and 152a, PTB-Mitt., 1991, 101, 337-9. [all data]

Altunin, Geller, et al., 1987
Altunin, V.V.; Geller, V.Z.; Kremenvskaya, E.A.; Perel'shtein, I.I.; Petrov, E.K., Thermophysical Properties of Freons, Methane Ser. Part 2, Vol. 9, NSRDS-USSR, Selover, T. B., Ed., Hemisphere, New York, 1987. [all data]

Okada, Uematsu, et al., 1986
Okada, M.; Uematsu, M.; Watanabe, K., Orthobaric liquid densities of trichloro-fluoromethane, dichlorodi-fluoromethane, chlorodifluoromethane, 1,1,2-trichlorotrifluoroethane, 1,2-dichlorotetrafluoroethane, and of the azeotropic mixtur, J. Chem. Thermodyn., 1986, 18, 527. [all data]

Higashi, Okazaki, et al., 1984
Higashi, Y.; Okazaki, S.; Takaishi, Y.; Uematsu, M.; Watanabe, K., Measurements of the Vapor-Liquid Coexistence Curve for the Binary R12 + R22 System in the Critical Region, J. Chem. Eng. Data, 1984, 29, 31-6. [all data]

Michels, Wassenaar, et al., 1966
Michels, A.; Wassenaar, T.; Wolkers, G.J.; Prins, Chr.; van de Klundert, L., P-v-t data and thermodynamical properties of freon-12 (ccl(2)f(2)) and freon-13 (cclf(3)) fluorocarbons at temperatures between 0 and 150c and at pressures up to 400 atm, J. Chem. Eng. Data, 1966, 11, 449. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Kudchadker, Kudchadker, et al., 1979
Kudchadker, A.P.; Kudchadker, S.A.; Shukla, R.P.; Patnaik, P.R., Vapor pressures and boiling points of selected halomethanes, J. Phys. Chem. Ref. Data, 1979, 8, 2, 499, https://doi.org/10.1063/1.555600 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Dispert and Lacmann, 1978
Dispert, H.; Lacmann, K., Negative ion formation in collisions between potassium and fluoro- and chloromethanes: Electron affinities and bond dissociation energies, Int. J. Mass Spectrom. Ion Phys., 1978, 28, 49. [all data]

Kischlat and Morgner, 1985
Kischlat, W.; Morgner, H., Comparative study of He(23S)-penning ionization and He(I) photoionization of CF4, CCl4, and the chlorofluoromethanes by electron-ion coincidence, J. Electron Spectrosc. Relat. Phenom., 1985, 35, 273. [all data]

Wang and Leroi, 1983
Wang, F.C.-Y.; Leroi, G.E., Photoionization and fragmentation of halogenated methanes, Ann. Isr. Phys. Soc., 1983, 6, 210. [all data]

Jochims, Lohr, et al., 1976
Jochims, H.-W.; Lohr, W.; Baumgartel, H., Photoreactions of small organic molecules V. Absorption-, photoion- and resonancephotoelectron-spectra of CF3Cl, CF2Cl2, CFCl3 in the energy range 10-25 eV, Ber. Bunsen-Ges. Phys. Chem., 1976, 80, 130. [all data]

Ajello, Huntress, et al., 1976
Ajello, J.M.; Huntress, W.T., Jr.; Rayermann, P., A photoionization mass spectrometer study of CFCl3, CF2Cl2 and CF3Cl, J. Chem. Phys., 1976, 64, 4746. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Baker and Tate, 1938
Baker, R.F.; Tate, J.T., Ionization and dissociation by electron impact in CCl2F2 and in CCl4 vapor, Phys. Rev., 1938, 53, 683. [all data]

Jadrny, Karlsson, et al., 1977
Jadrny, R.; Karlsson, L.; Mattsson, L.; Siegbahn, K., Valence electron spectra of the chlorofluoromethanes CF3Cl, CF2Cl2 and CFCl3, Phys. Scr., 1977, 16, 235. [all data]

Doucet, Sauvageau, et al., 1973
Doucet, J.; Sauvageau, P.; Sandorfy, C., Vacuum ultraviolet and photoelectron spectra of fluoro-chloro derivatives of methane, J. Chem. Phys., 1973, 58, 3708. [all data]

Zayats, Perov, et al., 1985
Zayats, A.Yu.; Perov, A.A.; Simonov, A.P., Formation of long-lived Rydberg atoms upon excitation of NF3 and CF2Cl2 molecules by electron impact, Sov. J. Chem. Phys., 1985, 2, 1906. [all data]

Schenk, Oertel, et al., 1979
Schenk, H.; Oertel, H.; Baumgartel, H., Photoreactions of small organic molecules VII Photoionization studies on the ion-pair formation of the fluorochloromethanes CF2Cl2, CF3Cl, and CFCl3, Ber. Bunsen-Ges. Phys. Chem., 1979, 83, 683. [all data]

Leyland, Majer, et al., 1970
Leyland, L.M.; Majer, J.R.; Robb, J.C., Heat of formation of the CF2Cl. radical, J. Chem. Soc. Faraday Trans., 1970, 66, 898. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, References