Dirubidium
- Formula: Rb2
- Molecular weight: 170.9356
- IUPAC Standard InChI: InChI=1S/2Rb
- IUPAC Standard InChIKey: MQZGYYYBCTXEME-UHFFFAOYSA-N
- CAS Registry Number: 25681-81-6
- Chemical structure:
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Gas 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. - 1600. | 1600. - 6000. |
|---|---|---|
| A | 7.411979 | 5.583311 |
| B | 7.920651 | -0.346557 |
| C | -10.32890 | 0.067709 |
| D | 3.161021 | -0.004487 |
| E | 0.014579 | 3.545302 |
| F | 24.64761 | 31.35650 |
| G | 71.90301 | 77.69520 |
| H | 27.07701 | 27.07701 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1983 | Data last reviewed in December, 1983 |
| 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. | 9.10 | 64.78 | 64.79 | -0.00 |
| 300. | 9.11 | 64.84 | 64.79 | 0.02 |
| 400. | 9.22 | 67.48 | 65.14 | 0.93 |
| 500. | 9.24 | 69.54 | 65.82 | 1.86 |
| 600. | 9.17 | 71.22 | 66.59 | 2.78 |
| 700. | 9.01 | 72.62 | 67.35 | 3.69 |
| 800. | 8.78 | 73.81 | 68.09 | 4.58 |
| 900. | 8.50 | 74.83 | 68.78 | 5.44 |
| 1000. | 8.18 | 75.71 | 69.43 | 6.28 |
| 1100. | 7.85 | 76.47 | 70.04 | 7.08 |
| 1200. | 7.52 | 77.14 | 70.60 | 7.84 |
| 1300. | 7.21 | 77.73 | 71.13 | 8.58 |
| 1400. | 6.94 | 78.25 | 71.62 | 9.29 |
| 1500. | 6.73 | 78.72 | 72.08 | 9.97 |
| 1600. | 6.60 | 79.15 | 72.50 | 10.64 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1600. | 6.57 | 79.15 | 72.50 | 10.64 |
| 1700. | 6.39 | 79.55 | 72.91 | 11.29 |
| 1800. | 6.25 | 79.91 | 73.29 | 11.92 |
| 1900. | 6.12 | 80.24 | 73.64 | 12.54 |
| 2000. | 6.01 | 80.55 | 73.98 | 13.14 |
| 2100. | 5.92 | 80.84 | 74.30 | 13.74 |
| 2200. | 5.83 | 81.12 | 74.60 | 14.33 |
| 2300. | 5.76 | 81.37 | 74.89 | 14.91 |
| 2400. | 5.70 | 81.62 | 75.17 | 15.48 |
| 2500. | 5.64 | 81.85 | 75.43 | 16.05 |
| 2600. | 5.59 | 82.07 | 75.68 | 16.61 |
| 2700. | 5.54 | 82.28 | 75.92 | 17.16 |
| 2800. | 5.50 | 82.48 | 76.15 | 17.71 |
| 2900. | 5.46 | 82.67 | 76.37 | 18.26 |
| 3000. | 5.43 | 82.86 | 76.59 | 18.81 |
| 3100. | 5.39 | 83.03 | 76.79 | 19.35 |
| 3200. | 5.37 | 83.20 | 76.99 | 19.89 |
| 3300. | 5.34 | 83.37 | 77.18 | 20.42 |
| 3400. | 5.32 | 83.53 | 77.37 | 20.95 |
| 3500. | 5.30 | 83.68 | 77.54 | 21.48 |
| 3600. | 5.28 | 83.83 | 77.72 | 22.01 |
| 3700. | 5.26 | 83.98 | 77.88 | 22.54 |
| 3800. | 5.24 | 84.12 | 78.05 | 23.07 |
| 3900. | 5.23 | 84.25 | 78.20 | 23.59 |
| 4000. | 5.21 | 84.38 | 78.36 | 24.11 |
| 4100. | 5.20 | 84.51 | 78.51 | 24.63 |
| 4200. | 5.19 | 84.64 | 78.65 | 25.15 |
| 4300. | 5.18 | 84.76 | 78.79 | 25.67 |
| 4400. | 5.17 | 84.88 | 78.93 | 26.19 |
| 4500. | 5.16 | 85.00 | 79.06 | 26.70 |
| 4600. | 5.15 | 85.11 | 79.19 | 27.22 |
| 4700. | 5.14 | 85.22 | 79.32 | 27.73 |
| 4800. | 5.14 | 85.33 | 79.44 | 28.25 |
| 4900. | 5.13 | 85.43 | 79.56 | 28.76 |
| 5000. | 5.12 | 85.54 | 79.68 | 29.28 |
| 5100. | 5.12 | 85.64 | 79.80 | 29.79 |
| 5200. | 5.11 | 85.74 | 79.91 | 30.30 |
| 5300. | 5.11 | 85.83 | 80.02 | 30.81 |
| 5400. | 5.10 | 85.93 | 80.13 | 31.32 |
| 5500. | 5.10 | 86.02 | 80.24 | 31.83 |
| 5600. | 5.09 | 86.12 | 80.34 | 32.34 |
| 5700. | 5.09 | 86.21 | 80.44 | 32.85 |
| 5800. | 5.08 | 86.29 | 80.54 | 33.36 |
| 5900. | 5.08 | 86.38 | 80.64 | 33.86 |
| 6000. | 5.07 | 86.47 | 80.74 | 34.37 |
References
Go To: Top, Gas 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, Gas Phase Heat Capacity (Shomate Equation), References
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