magnesium bromide
- Formula: Br2Mg
- Molecular weight: 184.113
- CAS Registry Number: 7789-48-2
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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 | -72.400 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 71.948 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 2000. to 6000. |
|---|---|
| A | 14.82150 |
| B | 0.070295 |
| C | -0.019036 |
| D | 0.001624 |
| E | -0.073111 |
| F | -77.06740 |
| G | 89.45179 |
| H | -72.40019 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 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 | -117.21 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 35.968 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -125.30 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 27.990 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 984. to 2000. |
|---|---|
| A | 25.00000 |
| B | -6.067520×10-8 |
| C | 3.624381×10-8 |
| D | -7.385101×10-9 |
| E | -4.555980×10-9 |
| F | -127.1060 |
| G | 60.90449 |
| H | -117.2100 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 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 (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 984. |
|---|---|
| A | 20.48140 |
| B | -3.984511 |
| C | 6.190311 |
| D | -1.404941 |
| E | -0.205494 |
| F | -131.9740 |
| G | 52.54469 |
| H | -125.3000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 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 |
|---|---|---|---|
| 10.47 | PE | Lee and Potts, 1979 | LLK |
| 10.65 ± 0.15 | EI | Berkowitz and Marquart, 1962 | RDSH |
| 10.85 ± 0.03 | PE | Lee and Potts, 1979 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| Br+ | 16. ± 1. | ? | EI | Berkowitz and Marquart, 1962 | RDSH |
| MgBr+ | 12.0 ± 0.4 | Br | EI | Berkowitz and Marquart, 1962 | RDSH |
| Br2+ | 17. ± 1. | Mg | EI | Berkowitz and Marquart, 1962 | RDSH |
| Mg+ | 16. ± 1. | ? | 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]
Lee and Potts, 1979
Lee, E.P.F.; Potts, A.W.,
An investigation of the valence shell electronic structure of alkaline earth halides by using Ab initio S. C. F. calculations and photoelectron spectroscopy,
Proc. R. Soc. London A:, 1979, 365, 395. [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]
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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