lead

• Formula: Pb
• Molecular weight: 207.2
• IUPAC Standard InChI: InChI=1S/Pb Copy

  
• IUPAC Standard InChIKey: WABPQHHGFIMREM-UHFFFAOYSA-N Copy
• CAS Registry Number: 7439-92-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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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.

Liquid Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Solid Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

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 by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

Reaction 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: John E. Bartmess

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

(CAS Reg. No. 64417-78-3 • 4294967295) +  = CAS Reg. No. 64417-78-3

By formula: (CAS Reg. No. 64417-78-3 • 4294967295Pb) + Pb = CAS Reg. No. 64417-78-3

Gas phase ion energetics 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 evaluated as indicated in comments:
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
B - John E. Bartmess

View reactions leading to Pb⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, NIST Free Links, 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]

Anonymous, 1988
Anonymous, X., , NBS Spec. Publ. (U. S.) 260, 1988. [all data]

Callanan, Sullivan, et al., 1985
Callanan, J.E.; Sullivan, S.A.; Vecchia, D.F., Feasibility Study for the Development of Standards Using Differential Scanning Calorimetry, Natl. Bur. Stand. Spec. Publ. 260-99 1985, 1985. [all data]

Ho, Polak, et al., 1992
Ho, J.; Polak, M.L.; Lineberger, W.C., Photoelectron Spectroscopy of Group-IV Heavy Metal Dimers - Sn2-, Pb2-, and SnPb-, J. Chem. Phys., 1992, 96, 1, 144, https://doi.org/10.1063/1.462503 . [all data]

Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Lineberger, W.C., Electron affinities of B, Al, Bi, and Pb, J. Chem. Phys., 1981, 74, 2, 1513, https://doi.org/10.1063/1.441174 . [all data]

Feldmann, Rackwitz, et al., 1977
Feldmann, D.; Rackwitz, R.; Heincke, H.; Kaiser, H.J., Photoabsolung von Elektronen der Ionen B-, Ga-, In-, Tl-, Ge-, und Pb-, Z. Naturforschung A, 1977, 32, 302. [all data]

Makarov and Zbezhneva, 1993
Makarov, A.V.; Zbezhneva, S.G., Use of high-temperature mass spectrometry for analysis of the vapour phase of some substances used in film deposition, Vysokochist. Veshchestva, 1993, 1, 124. [all data]

Ma, Hui, et al., 1992
Ma, W.Y.; Hui, Q.; Li, L.Q.; Zhao, W.Z.; Wen, K.L.; Chen, D.Y., RIS studies of Rydberg structures of the lead atom, Inst. Phys. Conf. Ser., 1992, 128(2), 75. [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]

Semenikhin, Rykov, et al., 1983
Semenikhin, V.I.; Rykov, A.N.; Sidorov, L.N., Mass spectrometric study of the evaporation of lead monoxide, Russ. J. Phys. Chem., 1983, 47, 1008, In original 1663. [all data]

Brown, Tilford, et al., 1977
Brown, C.M.; Tilford, S.G.; Ginter, M.L., Absorption spectrum of Pb I between 1350 and 2041 Å, J. Opt. Soc. Am., 1977, 67, 1240. [all data]

Suzer, Banna, et al., 1975
Suzer, S.; Banna, M.S.; Shirley, D.A., Relativistic and correlation effects in the 21.2-eV photoemission spectrum of atomic lead, J. Chem. Phys., 1975, 63, 3473. [all data]

Wood and Andrew, 1968
Wood, D.R.; Andrew, K.L., Arc spectrum of lead, J. Opt. Soc. Am., 1968, 58, 818. [all data]

Notes

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• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  S°liquid,1 bar	Entropy of liquid at standard conditions (1 bar)
  S°solid	Entropy of solid at standard conditions
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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