magnesium iodide
- Formula: I2Mg
- Molecular weight: 278.1139
- CAS Registry Number: 10377-58-9
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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 | -160.25 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 317.48 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 2000. to 6000. |
|---|---|
| A | 62.15583 |
| B | 0.172854 |
| C | -0.046867 |
| D | 0.004001 |
| E | -0.232487 |
| F | -179.5660 |
| G | 391.3429 |
| H | -160.2472 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1974 |
Condensed phase 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -342.25 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 155.66 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -366.94 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 129.67 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 907. to 2000. |
|---|---|
| A | 100.4160 |
| B | -9.324882×10-8 |
| C | 5.877852×10-8 |
| D | -1.249669×10-8 |
| E | -5.458280×10-9 |
| F | -378.5169 |
| G | 262.2749 |
| H | -342.2525 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1974 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 907. |
|---|---|
| A | 71.66648 |
| B | 25.89005 |
| C | -10.85217 |
| D | 2.647184 |
| E | -0.323860 |
| F | -390.4705 |
| G | 207.3205 |
| H | -366.9372 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1974 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed 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 as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.57 ± 0.03 | PI | Berkowitz, 1971 | LLK |
| 9.57 | PI | Berkowitz and Chupka, 1966 | RDSH |
| 10.0 ± 0.4 | EI | Berkowitz and Marquart, 1962 | RDSH |
| 10.5 | PE | Hammer, Allen, et al., 1978 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| MgI+ | ~10.12 ± 0.12 | I | PI | Berkowitz and Chupka, 1966 | RDSH |
| MgI+ | 11.5 ± 0.5 | I | EI | Berkowitz and Marquart, 1962 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase 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.
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]
Berkowitz and Chupka, 1966
Berkowitz, J.; Chupka, W.A.,
Photoionization of high-temperature vapors. I. The iodides of sodium, magnesium, and thallium,
J. Chem. Phys., 1966, 45, 1287. [all data]
Berkowitz and Marquart, 1962
Berkowitz, J.; Marquart, J.R.,
Mass-spectrometric study of the magnesium halides,
J. Chem. Phys., 1962, 37, 1853. [all data]
Hammer, Allen, et al., 1978
Hammer, C.A.; Allen, J.D., Jr.; Cusachs, L.C.; Schweitzer, G.K.,
The high-temperature photoelectron spectra of alkaline-earth chlorides and iodides,
J. Electron Spectrosc. Relat. Phenom., 1978, 13, 149. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance 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 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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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