Nitrogen

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Gas phase thermochemistry data

Go To: Top, Phase change data, Henry's Law 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.

Quantity Value Units Method Reference Comment
gas,1 bar45.7957 ± 0.001cal/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar45.796cal/mol*KReviewChase, 1998Data last reviewed in March, 1977

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 100. to 500.500. to 2000.2000. to 6000.
A 6.9279194.6620068.489178
B 0.4431114.7531200.269772
C -2.305798-2.055099-0.046870
D 3.9759490.3273860.003504
E 0.0000280.126100-1.088375
F -2.072637-1.179542-4.534157
G 54.1149150.7624353.77175
H 0.00.00.0
ReferenceChase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in March, 1977; New parameter fit January 2009 Data last reviewed in March, 1977; New parameter fit January 2009 Data last reviewed in March, 1977; New parameter fit January 2009

Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil77.34KN/AJacobsen, Stewart, et al., 1986TRC
Tboil77.4KN/AStreng, 1971Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Tfus63.3KN/AStreng, 1971Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Ttriple63.14KN/AJacobsen, Stewart, et al., 1986TRC
Ttriple63.14KN/AAngus, de Reuck, et al., 1979Uncertainty assigned by TRC = 0.005 K; TRC
Ttriple63.14KN/AHenning and Otto, 1936Uncertainty assigned by TRC = 0.06 K; temperature measured with He gas thermometer; TRC
Ttriple63.13KN/AGiauque and Clayton, 1933Crystal phase 1 phase; Uncertainty assigned by TRC = 0.06 K; TRC
Quantity Value Units Method Reference Comment
Ptriple0.1236atmN/AJacobsen, Stewart, et al., 1986Uncertainty assigned by TRC = 0.0005 atm; TRC
Ptriple0.1237atmN/AAngus, de Reuck, et al., 1979Uncertainty assigned by TRC = 0.0002 atm; TRC
Ptriple0.124atmN/AHenning and Otto, 1936Uncertainty assigned by TRC = 0.0007 atm; TRC
Ptriple0.1237atmN/AGiauque and Clayton, 1933Crystal phase 1 phase; Uncertainty assigned by TRC = 0.0001 atm; Average Pressure; TRC
Quantity Value Units Method Reference Comment
Tc126.19KN/AJacobsen, Stewart, et al., 1986Uncertainty assigned by TRC = 0.01 K; TRC
Tc126.2KN/AAngus, de Reuck, et al., 1979Uncertainty assigned by TRC = 0.05 K; TRC
Tc126.2KN/AWeber, 1970Uncertainty assigned by TRC = 0.2 K; IPTS-68, critical point not observed and Tc taken from literature but equation would allow pc to be calculated. Tc unct. several tenths K. "Ultra-high" purity nitrogen.; TRC
Tc128.45KN/ACardoso, 1915Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Pc33.534atmN/AJacobsen, Stewart, et al., 1986Uncertainty assigned by TRC = 0.007 atm; TRC
Pc33.56atmN/AAngus, de Reuck, et al., 1979Uncertainty assigned by TRC = 0.05 atm; TRC
Pc3.0297atmN/ACardoso, 1915Uncertainty assigned by TRC = 0.003 atm; TRC
Pc3.0281atmN/ACardoso, 1915Uncertainty assigned by TRC = 0.003 atm; TRC
Quantity Value Units Method Reference Comment
ρc11.18mol/lN/AJacobsen, Stewart, et al., 1986Uncertainty assigned by TRC = 0.02 mol/l; TRC
ρc11.2mol/lN/AAngus, de Reuck, et al., 1979Uncertainty assigned by TRC = 0.02 mol/l; TRC

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Reference Comment
1.578.Edejer and Thodos, 1967Based on data from 63. to 126. K.; AC
1.377.Giauque and Clayton, 1933, 2AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
63.14 to 126.3.7305264.651-6.788Edejer and Thodos, 1967Coefficents calculated by NIST from author's data.
63.14 to 78.003.63221257.877-6.344Moussa, Muijlwijk, et al., 1966Coefficents 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:


Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference
0.000601300.XN/A
0.000651300.LN/A

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law 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:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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

View reactions leading to N2+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)15.581 ± 0.008eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)118.0kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity111.0kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
15.581 ± 0.008STrickl, Cromwell, et al., 1989LL
15.7 ± 0.1EIStephen, Mark, et al., 1984LBLHLM
15.6 ± 0.1EIGrade, Wienecke, et al., 1983LBLHLM
15.60PEKimura, Katsumata, et al., 1981LLK
10.1 ± 0.6EIArmentrout, Tarr, et al., 1981LLK
15.58EIArmentrout, Tarr, et al., 1981LLK
15.5808EVALHuber and Herzberg, 1979LLK
15.58 ± 0.02EISahini, Constantin, et al., 1978LLK
15.5PIRabalais, Debies, et al., 1974LLK
15.58PELee and Rabalais, 1974LLK
15.61PENatalis, 1973LLK
15.58 ± 0.01PEHotop and Niehaus, 1970RDSH
15.56CICermak, 1968RDSH
15.58PICook and Metzger, 1964RDSH
15.5803SOgawa and Tanaka, 1962RDSH
15.5802SWorley, 1943RDSH
15.5812 ± 0.0002SWorley and Jenkins, 1938RDSH
15.58PEPotts and Williams, 1974Vertical value; LLK
15.60PEKatrib, Debies, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
N+24.34N(4So)EILocht, Schopman, et al., 1975LLK
N+24.3NEISmyth, Schiavone, et al., 1973LLK
N+24.4 ± 0.25NEICrowe and McConkey, 1973LLK
N+24.32 ± 0.03NEIHierl and Franklin, 1967RDSH
N+48. ± 2.N+EIHierl and Franklin, 1967RDSH
N+24.32 ± 0.02NEIFrost and McDowell, 1956RDSH

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law 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.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

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

Jacobsen, Stewart, et al., 1986
Jacobsen, R.T.; Stewart, R.B.; Jahangiri, M., Termodynamic Properties of Nitrogen from the Freezing Line to 2000 K at Pressures to 1000 MPa, J. Phys. Chem. Ref. Data, 1986, 15, 735-909. [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]

Angus, de Reuck, et al., 1979
Angus, S.; de Reuck, K.M.; Armstrong, B.; Jacobsen, R.T.; Stewart, R.B., International Thermodynamic Tables of the Fluid State - 6 Nitrogen, Pergamon, New York, 1979. [all data]

Henning and Otto, 1936
Henning, F.; Otto, J., Vapor pressure curves and triple points in the temperature region from 14 to 90 k, Phys. Z., 1936, 37, 633-8. [all data]

Giauque and Clayton, 1933
Giauque, W.F.; Clayton, J.O., Heat Capacity and Entropy of Nitrogen. Heat of Vaporization. Vapor Pressure of Solid and Liquid. The Reaction 1/2 N2 + 1/2 O2 = NO from Spectroscopic Data, J. Am. Chem. Soc., 1933, 55, 4875. [all data]

Weber, 1970
Weber, L.A., Some vapor pressure and P,V,T data on nitrogen in t he range 65 to 140 K, J. Chem. Thermodyn., 1970, 2, 839-846. [all data]

Cardoso, 1915
Cardoso, E., Study of the Critical Point of Several Difficultly LIquifiable Gases: Nitrogen, Carbon Monoxide, Oxygen and Methane, J. Chim. Phys. Phys.-Chim. Biol., 1915, 13, 312. [all data]

Edejer and Thodos, 1967
Edejer, Merardo P.; Thodos, George, Vapor pressures of liquid nitrogen between the triple and critical points, J. Chem. Eng. Data, 1967, 12, 2, 206-209, https://doi.org/10.1021/je60033a014 . [all data]

Giauque and Clayton, 1933, 2
Giauque, W.F.; Clayton, J.O., The Heat Capacity and Entropy of Nitrogen. Heat of Vaporization. Vapor Pressures of Solid and Liquid. The Reaction 1/2 N 2 + 1/2 O 2 = NO from Spectroscopic Data, J. Am. Chem. Soc., 1933, 55, 12, 4875-4889, https://doi.org/10.1021/ja01339a024 . [all data]

Moussa, Muijlwijk, et al., 1966
Moussa, M.R.; Muijlwijk, R.; van Dijk, H., The Vapour Pressure of Liquid Nitrogen, Physica (Amsterdam), 1966, 32, 5, 900-912, https://doi.org/10.1016/0031-8914(66)90021-8 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Trickl, Cromwell, et al., 1989
Trickl, T.; Cromwell, E.F.; Lee, Y.T.; Kung, A.H., State-selective ionization of nitrogen in the X2 =0 and v =1 states by two-color (1+1) photon excitation near threshold, J. Chem. Phys., 1989, 91, 6006. [all data]

Stephen, Mark, et al., 1984
Stephen, K.; Mark, T.D.; Futrell, J.H.; Helm, H., Electron impact ionization of (N2)2: Appearance energies of N3+ and N4+, J. Chem. Phys., 1984, 80, 3185. [all data]

Grade, Wienecke, et al., 1983
Grade, M.; Wienecke, J.; Rosinger, W.; Hirschwald, W., Electron impact investigation of the molecules SeS(g) and TeSe(g) under high-temperature equilibrium conditions, Ber. Bunsen-Ges. Phys. Chem., 1983, 87, 355. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Armentrout, Tarr, et al., 1981
Armentrout, P.B.; Tarr, S.M.; Dori, A.; Freund, R.S., Electron impact ionization cross section of metastable N2 (A2Σu+), J. Chem. Phys., 1981, 75, 2788. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]

Sahini, Constantin, et al., 1978
Sahini, V.E.; Constantin, V.; Serban, I., Determination of ionization potentials using a MI-1305 mass spectrometer, Rev. Roum. Chim., 1978, 23, 479. [all data]

Rabalais, Debies, et al., 1974
Rabalais, J.W.; Debies, T.P.; Berkosky, J.L.; Huang, J.-T.J.; Ellison, F.O., Calculated photoionization cross sections relative experimental photoionization intensities for a selection of small molecules, J. Chem. Phys., 1974, 61, 516. [all data]

Lee and Rabalais, 1974
Lee, T.H.; Rabalais, J.W., Vibrational transition probabilities in photoelectron spectra, J. Chem. Phys., 1974, 61, 2747. [all data]

Natalis, 1973
Natalis, P., Contribution a la spectroscopie photoelectronique. Effets de l'autoionisation dans less spectres photoelectroniques de molecules diatomiques et triatomiques, Acad. R. Belg. Mem. Cl. Sci. Collect. 8, 1973, 41, 1. [all data]

Hotop and Niehaus, 1970
Hotop, H.; Niehaus, A., Reactions of excited atoms and molecules with atoms and molecules. V.Comparison of Penning electron and photoelectron spectra of H2, N2 and CO, Intern. J. Mass Spectrom. Ion Phys., 1970, 5, 415. [all data]

Cermak, 1968
Cermak, V., Penning ionization electron spectroscopy. I. Determination of ionization potentials of polyatomic molecules, Collection Czech. Chem. Commun., 1968, 33, 2739. [all data]

Cook and Metzger, 1964
Cook, G.R.; Metzger, P.H., Photoionization and absorption cross sections of O2 and N2 in the 600- to 1000-A region, J. Chem. Phys., 1964, 41, 321. [all data]

Ogawa and Tanaka, 1962
Ogawa, M.; Tanaka, Y., Rydberg absorption series of N2, Can. J. Phys., 1962, 40, 1593. [all data]

Worley, 1943
Worley, R.E., Absorption spectrum of N2 in the extreme ultraviolet, Phys. Rev., 1943, 64, 207. [all data]

Worley and Jenkins, 1938
Worley, R.E.; Jenkins, F.A., A new Rydberg series in N2, Phys. Rev., 1938, 54, 305. [all data]

Potts and Williams, 1974
Potts, A.W.; Williams, T.A., The observation of "forbidden" transitions in He II photoelectron spectra, J. Electron Spectrosc. Relat. Phenom., 1974, 3, 3. [all data]

Katrib, Debies, et al., 1973
Katrib, A.; Debies, T.P.; Colton, R.J.; Lee, T.H.; Rabalais, J.W., The use of differential photoionization cross sections as a function of excitation energy in assigning photoelectron spectra, Chem. Phys. Lett., 1973, 22, 196. [all data]

Locht, Schopman, et al., 1975
Locht, R.; Schopman, J.; Wankenne, H.; Momigny, J., The dissociative ionization of nitrogen, Chem. Phys., 1975, 7, 393. [all data]

Smyth, Schiavone, et al., 1973
Smyth, K.C.; Schiavone, J.A.; Freund, R.S., Dissociative excitation of N2 by electron impact: Translational spectroscopy of long-lived high- Rydberg fragment atoms, J. Chem. Phys., 1973, 59, 5225. [all data]

Crowe and McConkey, 1973
Crowe, A.; McConkey, J.W., Dissociative ionization by electron impact II. N+ N++ from N2, J. Phys. B:, 1973, 6, 2108. [all data]

Hierl and Franklin, 1967
Hierl, P.M.; Franklin, J.L., Appearance potentials and kinetic energies of ions from N2, CO, and NO, J. Chem. Phys., 1967, 47, 3154. [all data]

Frost and McDowell, 1956
Frost, D.C.; McDowell, C.A., The dissociation energy of the nitrogen molecule, Proc. Roy. Soc. (London), 1956, A236, 278. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, References