Silicon timer
- Formula: Si3
- Molecular weight: 84.2565
- IUPAC Standard InChI: InChI=1S/Si3/c1-2-3-1
- IUPAC Standard InChIKey: VJNZTIUQOVUHQB-UHFFFAOYSA-N
- CAS Registry Number: 12597-37-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Silicon
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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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 6000. |
|---|---|
| A | 62.88678 |
| B | -2.292034 |
| C | 1.518324 |
| D | -0.155889 |
| E | -0.664449 |
| F | 615.0815 |
| G | 340.8504 |
| H | 635.9680 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1967 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 298. | 54.85 | 267.8 | 267.9 | -0.01 |
| 300. | 54.95 | 268.2 | 267.9 | 0.10 |
| 400. | 58.05 | 284.5 | 270.1 | 5.78 |
| 500. | 59.44 | 297.6 | 274.3 | 11.66 |
| 600. | 60.18 | 308.5 | 279.1 | 17.64 |
| 700. | 60.62 | 317.8 | 284.0 | 23.69 |
| 800. | 60.91 | 326.0 | 288.8 | 29.76 |
| 900. | 61.12 | 333.1 | 293.3 | 35.86 |
| 1000. | 61.29 | 339.6 | 297.6 | 41.99 |
| 1100. | 61.45 | 345.4 | 301.7 | 48.12 |
| 1200. | 61.59 | 350.8 | 305.6 | 54.27 |
| 1300. | 61.74 | 355.7 | 309.2 | 60.44 |
| 1400. | 61.89 | 360.3 | 312.7 | 66.62 |
| 1500. | 62.04 | 364.6 | 316.0 | 72.82 |
| 1600. | 62.21 | 368.6 | 319.2 | 79.03 |
| 1700. | 62.38 | 372.4 | 322.2 | 85.26 |
| 1800. | 62.57 | 375.9 | 325.1 | 91.51 |
| 1900. | 62.76 | 379.3 | 327.9 | 97.77 |
| 2000. | 62.96 | 382.6 | 330.5 | 104.1 |
| 2100. | 63.17 | 385.6 | 333.1 | 110.4 |
| 2200. | 63.40 | 388.6 | 335.5 | 116.7 |
| 2300. | 63.62 | 391.4 | 337.9 | 123.0 |
| 2400. | 63.86 | 394.1 | 340.2 | 129.4 |
| 2500. | 64.10 | 396.7 | 342.4 | 135.8 |
| 2600. | 64.35 | 399.2 | 344.5 | 142.2 |
| 2700. | 64.61 | 401.7 | 346.6 | 148.7 |
| 2800. | 64.87 | 404.0 | 348.6 | 155.2 |
| 2900. | 65.13 | 406.3 | 350.6 | 161.7 |
| 3000. | 65.39 | 408.5 | 352.5 | 168.2 |
| 3100. | 65.66 | 410.7 | 354.3 | 174.7 |
| 3200. | 65.93 | 412.8 | 356.1 | 181.3 |
| 3300. | 66.19 | 414.8 | 357.9 | 187.9 |
| 3400. | 66.46 | 416.8 | 359.6 | 194.6 |
| 3500. | 66.73 | 418.7 | 361.2 | 201.2 |
| 3600. | 66.99 | 420.6 | 362.8 | 207.9 |
| 3700. | 67.25 | 422.4 | 364.4 | 214.6 |
| 3800. | 67.50 | 424.2 | 366.0 | 221.4 |
| 3900. | 67.75 | 426.0 | 367.5 | 228.1 |
| 4000. | 67.99 | 427.7 | 369.0 | 234.9 |
| 4100. | 68.23 | 429.4 | 370.4 | 241.7 |
| 4200. | 68.46 | 431.0 | 371.9 | 248.5 |
| 4300. | 68.67 | 432.6 | 373.2 | 255.4 |
| 4400. | 68.88 | 434.2 | 374.6 | 262.3 |
| 4500. | 69.08 | 435.8 | 376.0 | 269.2 |
| 4600. | 69.27 | 437.3 | 377.3 | 276.1 |
| 4700. | 69.44 | 438.8 | 378.6 | 283.0 |
| 4800. | 69.60 | 440.3 | 379.8 | 290.0 |
| 4900. | 69.74 | 441.7 | 381.1 | 297.0 |
| 5000. | 69.87 | 443.1 | 382.3 | 303.9 |
| 5100. | 69.98 | 444.5 | 383.5 | 310.9 |
| 5200. | 70.08 | 445.8 | 384.7 | 317.9 |
| 5300. | 70.16 | 447.2 | 385.9 | 324.9 |
| 5400. | 70.21 | 448.5 | 387.0 | 332.0 |
| 5500. | 70.25 | 449.8 | 388.1 | 339.0 |
| 5600. | 70.27 | 451.0 | 389.3 | 346.0 |
| 5700. | 70.26 | 452.3 | 390.4 | 353.0 |
| 5800. | 70.23 | 453.5 | 391.4 | 360.1 |
| 5900. | 70.18 | 454.7 | 392.5 | 367.1 |
| 6000. | 70.10 | 455.9 | 393.5 | 374.1 |
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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