potassium iodide
- Formula: IK
- Molecular weight: 166.0028
- IUPAC Standard InChI: InChI=1S/HI.K/h1H;/q;+1/p-1
- IUPAC Standard InChIKey: NLKNQRATVPKPDG-UHFFFAOYSA-M
- CAS Registry Number: 7681-11-0
- Chemical structure:
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Solid Phase Heat Capacity (Shomate Equation)
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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 954. |
|---|---|
| A | 17.59650 |
| B | -20.41980 |
| C | 31.09400 |
| D | -11.67930 |
| E | -0.120080 |
| F | -83.36489 |
| G | 50.85120 |
| H | -78.37010 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1967 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 298. | 12.61 | 25.42 | 25.43 | -0.00 |
| 300. | 12.62 | 25.50 | 25.43 | 0.02 |
| 400. | 12.91 | 29.17 | 25.93 | 1.30 |
| 500. | 13.22 | 32.08 | 26.88 | 2.60 |
| 600. | 13.68 | 34.53 | 27.95 | 3.95 |
| 700. | 14.29 | 36.69 | 29.05 | 5.35 |
| 800. | 14.99 | 38.64 | 30.13 | 6.81 |
| 900. | 15.74 | 40.45 | 31.18 | 8.35 |
References
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), 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]
Notes
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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