helium

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Gas phase thermochemistry data

Go To: Top, Reaction 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.

Quantity Value Units Method Reference Comment
gas,1 bar30.1513 ± 0.0005cal/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar30.151cal/mol*KReviewChase, 1998Data last reviewed in March, 1982

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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Temperature (K) 298. to 6000.
A 4.967981
B 1.159331×10-10
C -3.783261×10-11
D 3.645079×10-12
E 7.639451×10-12
F -1.481201
G 36.16310
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in March, 1982

Reaction thermochemistry data

Go To: Top, Gas 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 by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Lithium ion (1+) + helium = (Lithium ion (1+) • helium)

By formula: Li+ + He = (Li+ • He)

Quantity Value Units Method Reference Comment
Δr1.71kcal/molIMobGatland, 1984gas phase
Δr1.64kcal/molSCATTERINGGislason, 1984gas phase
Δr1.69kcal/molIMobViehland, 1984gas phase
Δr1.09kcal/molIMobMason and Sharp, 1958gas phase
Δr3.16kcal/molIMobTakebe, 1983gas phase

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
-3.7309.DTColonna-Romano and Keller, 1976gas phase; low E/N

(Nickel ion (1+) • 2helium) + helium = (Nickel ion (1+) • 3helium)

By formula: (Ni+ • 2He) + He = (Ni+ • 3He)

Quantity Value Units Method Reference Comment
Δr1.6 ± 0.2kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 1.34 kcal/mol, ΔrS(100 K) = 12.0 cal/mol*K
Quantity Value Units Method Reference Comment
Δr12.6cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 1.34 kcal/mol, ΔrS(100 K) = 12.0 cal/mol*K

(Cobalt ion (1+) • 2helium) + helium = (Cobalt ion (1+) • 3helium)

By formula: (Co+ • 2He) + He = (Co+ • 3He)

Quantity Value Units Method Reference Comment
Δr1.3 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 1.22 kcal/mol, ΔrS(100 K) = 11.1 cal/mol*K
Quantity Value Units Method Reference Comment
Δr11.6cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 1.22 kcal/mol, ΔrS(100 K) = 11.1 cal/mol*K

(Nickel ion (1+) • helium) + helium = (Nickel ion (1+) • 2helium)

By formula: (Ni+ • He) + He = (Ni+ • 2He)

Quantity Value Units Method Reference Comment
Δr3.7 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.42 kcal/mol, ΔrS(100 K) = 19.8 cal/mol*K
Quantity Value Units Method Reference Comment
Δr20.3cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.42 kcal/mol, ΔrS(100 K) = 19.8 cal/mol*K

(Cobalt ion (1+) • helium) + helium = (Cobalt ion (1+) • 2helium)

By formula: (Co+ • He) + He = (Co+ • 2He)

Quantity Value Units Method Reference Comment
Δr3.7 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.41 kcal/mol, ΔrS(100 K) = 19.1 cal/mol*K
Quantity Value Units Method Reference Comment
Δr19.6cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.41 kcal/mol, ΔrS(100 K) = 19.1 cal/mol*K

Chromium ion (1+) + helium = (Chromium ion (1+) • helium)

By formula: Cr+ + He = (Cr+ • He)

Quantity Value Units Method Reference Comment
Δr1.3 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 0.98 kcal/mol, ΔrS(100 K) = 13.3 cal/mol*K
Quantity Value Units Method Reference Comment
Δr14.8cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 0.98 kcal/mol, ΔrS(100 K) = 13.3 cal/mol*K

Nickel ion (1+) + helium = (Nickel ion (1+) • helium)

By formula: Ni+ + He = (Ni+ • He)

Quantity Value Units Method Reference Comment
Δr3.5 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 2.97 kcal/mol, ΔrS(100 K) = 14.7 cal/mol*K
Quantity Value Units Method Reference Comment
Δr17.1cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 2.97 kcal/mol, ΔrS(100 K) = 14.7 cal/mol*K

Cobalt ion (1+) + helium = (Cobalt ion (1+) • helium)

By formula: Co+ + He = (Co+ • He)

Quantity Value Units Method Reference Comment
Δr3.6 ± 0.1kcal/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.02 kcal/mol, ΔrS(100 K) = 14.7 cal/mol*K
Quantity Value Units Method Reference Comment
Δr17.1cal/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 3.02 kcal/mol, ΔrS(100 K) = 14.7 cal/mol*K

(He+ • helium) + helium = (He+ • 2helium)

By formula: (He+ • He) + He = (He+ • 2He)

Quantity Value Units Method Reference Comment
Δr4.2kcal/molDTPatterson, 1968gas phase; corrected for ln T term
Quantity Value Units Method Reference Comment
Δr18.4cal/mol*KDTPatterson, 1968gas phase; corrected for ln T term

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
-1.9300.SAMSGusinow, Gerber, et al., 1970gas phase

Sodium ion (1+) + helium = (Sodium ion (1+) • helium)

By formula: Na+ + He = (Na+ • He)

Quantity Value Units Method Reference Comment
Δr1.19kcal/molSCATTERINGGislason, 1984gas phase
Δr0.79kcal/molIMobViehland, 1984gas phase
Δr0.93kcal/molIMobMason and Sharp, 1958gas phase
Δr1.38kcal/molIMobTakebe, 1983gas phase

Potassium ion (1+) + helium = (Potassium ion (1+) • helium)

By formula: K+ + He = (K+ • He)

Quantity Value Units Method Reference Comment
Δr0.58kcal/molSCATTERINGGislason, 1984gas phase
Δr0.53kcal/molIMobViehland, 1984gas phase
Δr0.53kcal/molIMobTakebe, 1983gas phase
Δr0.57kcal/molIMobRobson and Kumar, 1973gas phase

(He+ • 2helium) + helium = (He+ • 3helium)

By formula: (He+ • 2He) + He = (He+ • 3He)

Quantity Value Units Method Reference Comment
Δr3.73 ± 0.15kcal/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Δr17.7cal/mol*KPHPMSHiraoka and Mori, 1990gas phase

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
0.677.DTHelm, 1976gas phase

(He+ • 3helium) + helium = (He+ • 4helium)

By formula: (He+ • 3He) + He = (He+ • 4He)

Quantity Value Units Method Reference Comment
Δr0.64 ± 0.15kcal/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Δr12.8cal/mol*KPHPMSHiraoka and Mori, 1990gas phase

(He+ • 4helium) + helium = (He+ • 5helium)

By formula: (He+ • 4He) + He = (He+ • 5He)

Quantity Value Units Method Reference Comment
Δr0.48 ± 0.15kcal/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Δr10.8cal/mol*KPHPMSHiraoka and Mori, 1990gas phase

Nitrogen cation + helium = (Nitrogen cation • helium)

By formula: N2+ + He = (N2+ • He)

Quantity Value Units Method Reference Comment
Δr0.4kcal/molPDissBieske, Soliva, et al., 1990gas phase; same ΔrH for N2+(B) and (N2+)X; ab initio, Miller, Tennyson, et al., 1988

He+ + helium = (He+ • helium)

By formula: He+ + He = (He+ • He)

Quantity Value Units Method Reference Comment
Δr54.5kcal/molEmSpecDehmer and Pratt, 1982gas phase
Δr58.8kcal/molSCATTERINGMittman and Weise, 1974gas phase

Cesium ion (1+) + helium = (Cesium ion (1+) • helium)

By formula: Cs+ + He = (Cs+ • He)

Quantity Value Units Method Reference Comment
Δr0.36kcal/molSCATTERINGGislason, 1984gas phase
Δr0.32kcal/molIMobMason and Sharp, 1958gas phase

HN2+ + helium = (HN2+ • helium)

By formula: HN2+ + He = (HN2+ • He)

Quantity Value Units Method Reference Comment
Δr1.2kcal/molSCATTERINGMeuwly, Nizkorodov, et al., 1996gas phase

Ne+ + helium = (Ne+ • helium)

By formula: Ne+ + He = (Ne+ • He)

Quantity Value Units Method Reference Comment
Δr16.0kcal/molEmSpecDehmer and Pratt, 1982gas phase

Ar+ + helium = (Ar+ • helium)

By formula: Ar+ + He = (Ar+ • He)

Quantity Value Units Method Reference Comment
Δr0.60kcal/molEmSpecDehmer and Pratt, 1982gas phase

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)24.58741eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)42.50kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity35.49kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
24.58741EVALLide, 1992LL
24.56EIWetzel, Baiocchi, et al., 1987LBLHLM
24.588SKelly, 1987LBLHLM
24.58741SMoore, 1970RDSH
24.59 ± 0.03EIKaneko, 1960RDSH
24.6 ± 0.1PIWeissler, Samson, et al., 1959RDSH

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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]

Gatland, 1984
Gatland, I.R., Swarms of Ions and Electrons in Gases, W. Lindinger, T. D. Mark and F. Howorka, eds. (Springer, New York, 1984, 1984, 44. [all data]

Gislason, 1984
Gislason, E.A., Quoted in I. R. Gatland in Swarms of Ions and Electrons in Gases, W. Lindinger, T. D. Mark and F. Howorka, eds. (Springer, New York, 1984, 1984, 44. [all data]

Viehland, 1984
Viehland, L.A., Interaction Potentials for Li+ - Rare - Gas Systems, Chem. Phys., 1984, 78, 2, 279, https://doi.org/10.1016/0301-0104(83)85114-3 . [all data]

Mason and Sharp, 1958
Mason, E.A.; Sharp, H.W., Mobility of gaseous lons in weak electric fields, Ann. Phys., 1958, 4, 3, 233, https://doi.org/10.1016/0003-4916(58)90049-6 . [all data]

Takebe, 1983
Takebe, M., The Generalized Mobility Curve for Alkali Ions in Rare Gases: Clustering Reactions and Mobility Curves, J. Chem. Phys., 1983, 78, 12, 7223, https://doi.org/10.1063/1.444763 . [all data]

Colonna-Romano and Keller, 1976
Colonna-Romano, L.M.; Keller, G.E., The Clustering of O2 and He to Li+, J. Chem. Phys., 1976, 64, 6, 2684, https://doi.org/10.1063/1.432522 . [all data]

Kemper, Hsu, et al., 1991
Kemper, P.R.; Hsu, M.T.; Bowers, M.T., Transition - Metal Ion - Rare Gas Clusters: Bond Strengths and Molecular Parameters for Co+(He/Ne)n, Ni+(He/Ne)n, and Cr+(He/Ne/Ar), J. Phys. Chem., 1991, 95, 26, 10600, https://doi.org/10.1021/j100179a022 . [all data]

Patterson, 1968
Patterson, P.L., Evidence of the Existence of an He3+ Ion, J. Chem. Phys., 1968, 48, 8, 3625, https://doi.org/10.1063/1.1669660 . [all data]

Gusinow, Gerber, et al., 1970
Gusinow, M.A.; Gerber, R.A.; Gerardo, J.B., He3+ and He4+ in 300K Helium Plasmas: Their Effect on Recombination Loss of Electrons, Phys. Rev. Lett., 1970, 25, 18, 1248, https://doi.org/10.1103/PhysRevLett.25.1248 . [all data]

Robson and Kumar, 1973
Robson, R.E.; Kumar, K., Mobility and Diffusion II. Dependence on Experimental Variables and Interaction Potential for Alkali Ions in Rare Gases, Aust. J. Phys., 1973, 26, 2, 187, https://doi.org/10.1071/PH730187 . [all data]

Hiraoka and Mori, 1990
Hiraoka, K.; Mori, T., Stability of Rare - Gas Cluster Ions, J. Chem. Phys., 1990, 92, 7, 4408, https://doi.org/10.1063/1.457751 . [all data]

Helm, 1976
Helm, H., The Mobilities and Equilibrium Reactions of Helium Ions in Helium at 77K, J. Phys. B, 1976, 9, 7, 1171, https://doi.org/10.1088/0022-3700/9/7/017 . [all data]

Bieske, Soliva, et al., 1990
Bieske, E.J.; Soliva, A.; Welker, M.A.; Maier, J.P., The B<---X Electronic Spectrum of N2+ He, J. Chem. Phys., 1990, 93, 6, 4477, https://doi.org/10.1063/1.458732 . [all data]

Miller, Tennyson, et al., 1988
Miller, S.; Tennyson, J.; Follmeg, B.; Rosmus, P.; Werner, H., Ab initio Investigation of the Bond Rovibrational States in the Electronic Ground State of HeN2+, J. Chem. Phys., 1988, 89, 4, 2178, https://doi.org/10.1063/1.455062 . [all data]

Dehmer and Pratt, 1982
Dehmer, P.M.; Pratt, S.T., Photoionization of ArKr, ArXe, and KrXe and bond dissociation energies of the rare gas dimer ions, J. Chem. Phys., 1982, 77, 4804. [all data]

Mittman and Weise, 1974
Mittman, H.U.; Weise, H.P., Scattering of Ions V. Elastic Scattering of the Symmetric Rare Gas Ion - Rare Gas Atom Systems, Z. Naturforsch., 1974, A29, 400. [all data]

Meuwly, Nizkorodov, et al., 1996
Meuwly, M.; Nizkorodov, S.A.; Maier, J.P.; Bieske, E.J., Mid-Infrared Spectra of He-HN2+ and He2-HN2+, J. Chem. Phys., 1996, 104, 11, 3876, https://doi.org/10.1063/1.471244 . [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]

Lide, 1992
Lide, D.R. (Editor), Ionization potentials of atoms and atomic ions in Handbook of Chem. and Phys., 1992, 10-211. [all data]

Wetzel, Baiocchi, et al., 1987
Wetzel, R.C.; Baiocchi, F.A.; Hayes, T.R.; Freund, R.S., Absolute cross sections for electron-impact ionization of the rare-gas atoms by the fast-neutral-beam method, Phys. Rev. A, 1987, 35, 559. [all data]

Kelly, 1987
Kelly, R.L., Atomic and ionic spectrum lines of hydrogen through kryton, J. Phys. Chem. Ref. Data, 1987, 16. [all data]

Moore, 1970
Moore, C.E., Ionization potentials and ionization limits derived from the analyses of optical spectra, Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]

Kaneko, 1960
Kaneko, Y., Ionization efficiency curves for A+, Kr+, N2+, and CO+ by electron impact, J. Phys. Soc. Japan, 1960, 16, 1587. [all data]

Weissler, Samson, et al., 1959
Weissler, G.L.; Samson, J.A.R.; Ogawa, M.; Cook, G.R., Photoionization analysis by mass spectroscopy, J. Opt. Soc. Am., 1959, 49, 338. [all data]


Notes

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