lead diiodide
- Formula: I2Pb
- Molecular weight: 461.0
- CAS Registry Number: 10101-63-0
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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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -0.760 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 85.935 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1973 |
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) | 1500. to 6000. |
|---|---|
| A | 13.90900 |
| B | 0.001165 |
| C | -0.000306 |
| D | 0.000025 |
| E | -0.012377 |
| F | -4.948590 |
| G | 102.6970 |
| H | -0.760039 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -37.686 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 47.538 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -41.919 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 41.788 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1973 |
Liquid 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) | 683. to 1500. |
|---|---|
| A | 25.95010 |
| B | -4.433500×10-8 |
| C | 3.701860×10-8 |
| D | -1.043011×10-8 |
| E | -1.123410×10-9 |
| F | -46.58081 |
| G | 75.83449 |
| H | -37.68621 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
Solid 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 683. |
|---|---|
| A | 31.85509 |
| B | -53.03490 |
| C | 72.69720 |
| D | -24.91831 |
| E | -0.293733 |
| F | -50.63870 |
| G | 91.48549 |
| H | -41.92001 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
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: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 41. ± 3. | kcal/mol | AVG | N/A | Average of 6 values; Individual data points |
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 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
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 8.86 ± 0.03 | PI | Berkowitz, 1971 | LLK |
| 8.90 | PE | Novak and Potts, 1984 | Vertical value; LBLHLM |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, NIST Free Links, NIST Subscription Links, 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]
Berkowitz, 1971
Berkowitz, J.,
Photoionization mass spectrometry photoelectron spectroscopy of high temperature vapor,
Adv. High Temp. Chem., 1971, 3, 123. [all data]
Novak and Potts, 1984
Novak, I.; Potts, A.W.,
Ultraviolet photoelectron spectra of gas phase and condensed tin and lead dihalides (MX2, M = Sn, Pb X = Cl, Br, I),
J. Electron Spectrosc. Relat. Phenom., 1984, 33, 1. [all data]
Notes
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- Symbols used in this document:
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 ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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