potassium bromide
- Formula: BrK
- Molecular weight: 119.002
- IUPAC Standard InChI: InChI=1S/BrH.K/h1H;/q;+1/p-1
- IUPAC Standard InChIKey: IOLCXVTUBQKXJR-UHFFFAOYSA-M
- CAS Registry Number: 7758-02-3
- Chemical structure:
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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 | -376.49 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 105.54 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -393.80 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 95.92 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 1007. to 2500. |
|---|---|
| A | 69.87322 |
| B | -8.511470×10-10 |
| C | 5.852203×10-10 |
| D | -1.246246×10-10 |
| E | -1.695457×10-11 |
| F | -397.3252 |
| G | 190.0971 |
| H | -376.4922 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 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 (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 900. | 900. to 1007. |
|---|---|---|
| A | 39.22249 | -1166.152 |
| B | 63.36459 | 2069.946 |
| C | -94.72785 | -1261.945 |
| D | 60.44918 | 271.2404 |
| E | 0.091212 | 154.9616 |
| F | -407.2932 | 286.0182 |
| G | 128.6848 | -1287.141 |
| H | -393.7985 | -393.7985 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1967 | Data last reviewed in March, 1967 |
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.
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 1068. to 1656. | 4.57146 | 6940.81 | -136.349 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction 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.
Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
+
= (
•
)
By formula: K+ + BrK = (K+ • BrK)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 174. | kJ/mol | MS | Kudin, Gusarov, et al., 1973 | gas phase; Knudsen cell; M |
| ΔrH° | 171. | kJ/mol | MS | Chupka, 1959 | gas phase; Knudsen cell; M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 95.4 | J/mol*K | MS | Chupka, 1959 | gas phase; Knudsen cell; M |
3 +
= 3
+ KBrO3
By formula: 3C5H5NO + BrK = 3C5H5N + KBrO3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 313.6 ± 9.6 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 | solid phase; ALS |
Ion clustering 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
+
= (
•
)
By formula: K+ + BrK = (K+ • BrK)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 174. | kJ/mol | MS | Kudin, Gusarov, et al., 1973 | gas phase; Knudsen cell |
| ΔrH° | 171. | kJ/mol | MS | Chupka, 1959 | gas phase; Knudsen cell |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 95.4 | J/mol*K | MS | Chupka, 1959 | gas phase; Knudsen cell |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Ion clustering 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]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Kudin, Gusarov, et al., 1973
Kudin, L.S.; Gusarov, A.V.; Gorokhov, L.N.,
Mass Spectrometer Study of Equilibria Involving Ions. 1. Potassium Bromide and Sulfate,
High Temp., 1973, 11, 50. [all data]
Chupka, 1959
Chupka, W.A.,
Dissociation Energies of Some Gaseous Halide Complex Ions and the Hydrated Ion K(H2O)+,
J. Chem. Phys., 1959, 40, 2, 458, https://doi.org/10.1063/1.1729974
. [all data]
Shaofeng and Pilcher, 1988
Shaofeng, L.; Pilcher, G.,
Enthalpy of formation of pyridine-N-oxide: the dissociation enthalpy of the (N-O) bond,
J. Chem. Thermodyn., 1988, 20, 463-465. [all data]
Notes
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- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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