disodium sulphide
- Formula: Na2S
- Molecular weight: 78.045
- CAS Registry Number: 1313-82-2
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Liquid 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) | 1445. to 3000. |
|---|---|
| A | 22.00000 |
| B | -0.000011 |
| C | 0.000004 |
| D | -5.532529×10-7 |
| E | -0.000003 |
| F | -84.68069 |
| G | 55.64675 |
| H | -77.42352 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1445. | 22.00 | 63.75 | 46.77 | 24.53 |
| 1500. | 22.00 | 64.57 | 47.41 | 25.74 |
| 1600. | 22.00 | 65.99 | 48.52 | 27.94 |
| 1700. | 22.00 | 67.32 | 49.59 | 30.14 |
| 1800. | 22.00 | 68.58 | 50.61 | 32.34 |
| 1900. | 22.00 | 69.77 | 51.59 | 34.54 |
| 2000. | 22.00 | 70.90 | 52.52 | 36.74 |
| 2100. | 22.00 | 71.97 | 53.43 | 38.94 |
| 2200. | 22.00 | 72.99 | 54.29 | 41.14 |
| 2300. | 22.00 | 73.97 | 55.13 | 43.34 |
| 2400. | 22.00 | 74.91 | 55.93 | 45.54 |
| 2500. | 22.00 | 75.81 | 56.71 | 47.74 |
| 2600. | 22.00 | 76.67 | 57.46 | 49.94 |
| 2700. | 22.00 | 77.50 | 58.19 | 52.14 |
| 2800. | 22.00 | 78.30 | 58.89 | 54.34 |
| 2900. | 22.00 | 79.07 | 59.57 | 56.54 |
| 3000. | 22.00 | 79.82 | 60.24 | 58.74 |
References
Go To: Top, Liquid 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, Liquid Phase Heat Capacity (Shomate Equation), References
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