Mercury diiodide
- Formula: HgI2
- Molecular weight: 454.40
- IUPAC Standard InChI: InChI=1S/Hg.2HI/h;2*1H/q+2;;/p-2
- IUPAC Standard InChIKey: YFDLHELOZYVNJE-UHFFFAOYSA-L
- CAS Registry Number: 7774-29-0
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Phase change 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°gas | -16.13 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1962 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 336.21 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1962 |
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) | 1500. to 6000. |
|---|---|
| A | 62.33281 |
| B | 0.021751 |
| C | -0.005941 |
| D | 0.000511 |
| E | -0.108958 |
| F | -35.08004 |
| G | 411.0186 |
| H | -16.12903 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1962 |
Phase change data
Go To: Top, Gas 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 by: William E. Acree, Jr., James S. Chickos
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 64.0 | 574. | UV | Su, Zhu, et al., 2002 | Based on data from 537. to 610. K. |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Method | Reference |
|---|---|---|---|
| 20.3 | 537. | Sub-Vap | Su, Zhu, et al., 2002 |
References
Go To: Top, Gas phase thermochemistry data, Phase change 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]
Su, Zhu, et al., 2002
Su, Ching-Hua; Zhu, Shen; Ramachandran, N.; Burger, A.,
Beer law constants and vapor pressures of HgI2 over HgI2(s,l),
Journal of Crystal Growth, 2002, 235, 1-4, 313-319, https://doi.org/10.1016/S0022-0248(01)01806-1
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfusH Enthalpy of fusion ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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