lead
- Formula: Pb
- Molecular weight: 207.2
- IUPAC Standard InChI: InChI=1S/Pb
- IUPAC Standard InChIKey: WABPQHHGFIMREM-UHFFFAOYSA-N
- 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.
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- Other data available:
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- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase thermochemistry data
Go To: Top, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 46.7 ± 0.2 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°gas | 46.654 | kcal/mol | Review | Chase, 1998 | Data last reviewed in March, 1962 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 41.916 ± 0.001 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 41.914 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1962 |
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) | 2019.022 to 6000. |
|---|---|
| A | -20.47290 |
| B | 16.55870 |
| C | -3.182959 |
| D | 0.200772 |
| E | 17.48260 |
| F | 79.67220 |
| G | 40.64080 |
| H | 46.65399 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1962 |
Reaction thermochemistry data
Go To: Top, Gas phase 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 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 42.98 ± 0.41 | kcal/mol | N/A | Ho, Polak, et al., 1992 | gas phase |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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]
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]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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