Tetracarbon
- Formula: C4
- Molecular weight: 48.0428
- IUPAC Standard InChI: InChI=1S/C4/c1-3-2-4(1)3
- IUPAC Standard InChIKey: BEMJFDKMIISOFB-UHFFFAOYSA-N
- CAS Registry Number: 12184-80-4
- 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. to 1200. | 1200. to 6000. |
|---|---|---|
| A | 8.333270 | 20.08200 |
| B | 20.15970 | 0.417416 |
| C | -13.30020 | -0.081463 |
| D | 3.304881 | 0.005486 |
| E | -0.111889 | -2.133951 |
| F | 228.3550 | 220.8820 |
| G | 58.57641 | 71.80550 |
| H | 232.0000 | 232.0000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1969 | Data last reviewed in December, 1969 |
| 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. | 11.99 | 54.56 | 54.57 | -0.00 |
| 300. | 12.03 | 54.64 | 54.57 | 0.02 |
| 400. | 13.78 | 58.36 | 55.07 | 1.32 |
| 500. | 15.05 | 61.58 | 56.05 | 2.76 |
| 600. | 16.04 | 64.41 | 57.22 | 4.32 |
| 700. | 16.83 | 66.95 | 58.43 | 5.96 |
| 800. | 17.47 | 69.24 | 59.64 | 7.68 |
| 900. | 17.97 | 71.33 | 60.82 | 9.45 |
| 1000. | 18.39 | 73.24 | 61.97 | 11.27 |
| 1100. | 18.72 | 75.01 | 63.08 | 13.13 |
| 1200. | 19.01 | 76.65 | 64.14 | 15.02 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1200. | 18.99 | 76.65 | 64.14 | 15.02 |
| 1300. | 19.24 | 78.18 | 65.16 | 16.93 |
| 1400. | 19.43 | 79.62 | 66.14 | 18.86 |
| 1500. | 19.59 | 80.96 | 67.09 | 20.81 |
| 1600. | 19.73 | 82.23 | 68.00 | 22.78 |
| 1700. | 19.84 | 83.43 | 68.87 | 24.76 |
| 1800. | 19.94 | 84.57 | 69.71 | 26.75 |
| 1900. | 20.03 | 85.65 | 70.52 | 28.75 |
| 2000. | 20.10 | 86.68 | 71.30 | 30.75 |
| 2100. | 20.17 | 87.66 | 72.06 | 32.77 |
| 2200. | 20.22 | 88.60 | 72.79 | 34.79 |
| 2300. | 20.27 | 89.50 | 73.50 | 36.81 |
| 2400. | 20.32 | 90.36 | 74.18 | 38.84 |
| 2500. | 20.36 | 91.19 | 74.84 | 40.87 |
| 2600. | 20.40 | 91.99 | 75.49 | 42.91 |
| 2700. | 20.43 | 92.76 | 76.11 | 44.95 |
| 2800. | 20.46 | 93.51 | 76.72 | 47.00 |
| 2900. | 20.49 | 94.23 | 77.31 | 49.05 |
| 3000. | 20.51 | 94.92 | 77.89 | 51.10 |
| 3100. | 20.53 | 95.59 | 78.45 | 53.15 |
| 3200. | 20.55 | 96.25 | 79.00 | 55.20 |
| 3300. | 20.57 | 96.88 | 79.53 | 57.26 |
| 3400. | 20.59 | 97.49 | 80.05 | 59.32 |
| 3500. | 20.61 | 98.09 | 80.55 | 61.38 |
| 3600. | 20.62 | 98.67 | 81.05 | 63.44 |
| 3700. | 20.63 | 99.24 | 81.53 | 65.50 |
| 3800. | 20.65 | 99.79 | 82.01 | 67.56 |
| 3900. | 20.66 | 100.3 | 82.47 | 69.63 |
| 4000. | 20.67 | 100.8 | 82.92 | 71.70 |
| 4100. | 20.68 | 101.4 | 83.37 | 73.76 |
| 4200. | 20.68 | 101.9 | 83.80 | 75.83 |
| 4300. | 20.69 | 102.3 | 84.23 | 77.90 |
| 4400. | 20.70 | 102.8 | 84.64 | 79.97 |
| 4500. | 20.71 | 103.3 | 85.05 | 82.04 |
| 4600. | 20.71 | 103.7 | 85.45 | 84.11 |
| 4700. | 20.72 | 104.2 | 85.85 | 86.18 |
| 4800. | 20.72 | 104.6 | 86.23 | 88.25 |
| 4900. | 20.73 | 105.0 | 86.61 | 90.33 |
| 5000. | 20.73 | 105.5 | 86.99 | 92.40 |
| 5100. | 20.74 | 105.9 | 87.35 | 94.47 |
| 5200. | 20.74 | 106.3 | 87.71 | 96.55 |
| 5300. | 20.75 | 106.7 | 88.07 | 98.62 |
| 5400. | 20.75 | 107.1 | 88.42 | 100.7 |
| 5500. | 20.76 | 107.4 | 88.76 | 102.8 |
| 5600. | 20.76 | 107.8 | 89.09 | 104.8 |
| 5700. | 20.76 | 108.2 | 89.43 | 106.9 |
| 5800. | 20.77 | 108.5 | 89.75 | 109.0 |
| 5900. | 20.77 | 108.9 | 90.07 | 111.1 |
| 6000. | 20.78 | 109.3 | 90.39 | 113.2 |
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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