Tungsten pentabromide
- Formula: Br5W
- Molecular weight: 583.36
- CAS Registry Number: 13470-11-6
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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 | -47.600 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 110.29 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1967 |
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) | 1000. - 6000. |
|---|---|
| A | 31.56740 |
| B | 0.091040 |
| C | 0.139414 |
| D | -0.019292 |
| E | -0.103943 |
| F | -57.36439 |
| G | 147.8780 |
| H | -47.60000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1967 |
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 | -71.238 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 70.110 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -74.500 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 64.998 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1967 |
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) | 559. - 1000. |
|---|---|
| A | 43.50000 |
| B | 0.000000 |
| C | 0.000000 |
| D | 0.000000 |
| E | 0.000000 |
| F | -84.20741 |
| G | 122.7520 |
| H | -71.23791 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1967 |
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.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 559. |
|---|---|
| A | 28.61840 |
| B | 29.17569 |
| C | -6.665770 |
| D | 2.844441 |
| E | 0.031635 |
| F | -84.17110 |
| G | 91.38110 |
| H | -74.50010 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1967 |
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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 8.3 ± 0.2 | EI | Kaposi, Popovic, et al., 1977 | LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| BrW+ | 20.9 ± 0.3 | 4Br | EI | Kaposi, Popovic, et al., 1977 | LLK |
| Br2W+ | 16.6 ± 0.2 | 3Br | EI | Kaposi, Popovic, et al., 1977 | LLK |
| Br3W+ | 13.4 ± 0.2 | 2Br | EI | Kaposi, Popovic, et al., 1977 | LLK |
| Br4W+ | 10.0 ± 0.2 | Br | EI | Kaposi, Popovic, et al., 1977 | LLK |
| W+ | 25.0 ± 0.3 | 5Br | EI | Kaposi, Popovic, et al., 1977 | LLK |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Kaposi, Popovic, et al., 1977
Kaposi, O.; Popovic, A.; Marsel, J.,
Mass spectrometric studies of tungsten bromides and oxybromides,
J. Inorg. Nucl. Chem., 1977, 39, 1809. [all data]
Notes
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- 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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