silicon nitride
- Formula: NSi
- Molecular weight: 42.0922
- IUPAC Standard InChI: InChI=1S/NSi/c1-2
- IUPAC Standard InChIKey: NCLWWTWAYQTPBU-UHFFFAOYSA-N
- CAS Registry Number: 12033-60-2
- 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 (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 1400. | 1400. to 6000. |
|---|---|---|
| A | 22.67703 | 22.14503 |
| B | 29.92075 | 15.73858 |
| C | -23.71090 | -3.581759 |
| D | 7.322711 | 0.258812 |
| E | 0.041574 | 0.296314 |
| F | 364.6197 | 367.8121 |
| G | 236.5554 | 243.3854 |
| H | 372.3764 | 372.3764 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1967 | 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. | 30.15 | 216.8 | 216.8 | -0.00 |
| 300. | 30.18 | 217.0 | 216.8 | 0.06 |
| 400. | 31.58 | 225.9 | 218.0 | 3.14 |
| 500. | 32.79 | 233.1 | 220.3 | 6.37 |
| 600. | 33.79 | 239.1 | 223.0 | 9.70 |
| 700. | 34.60 | 244.4 | 225.7 | 13.12 |
| 800. | 35.25 | 249.1 | 228.3 | 16.61 |
| 900. | 35.79 | 253.2 | 230.8 | 20.16 |
| 1000. | 36.25 | 257.0 | 233.3 | 23.77 |
| 1100. | 36.68 | 260.5 | 235.6 | 27.41 |
| 1200. | 37.12 | 263.7 | 237.8 | 31.10 |
| 1300. | 37.62 | 266.7 | 239.9 | 34.84 |
| 1400. | 38.21 | 269.5 | 241.9 | 38.63 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1400. | 38.02 | 269.5 | 241.9 | 38.62 |
| 1500. | 38.70 | 272.2 | 243.9 | 42.46 |
| 1600. | 39.33 | 274.7 | 245.7 | 46.36 |
| 1700. | 39.92 | 277.1 | 247.5 | 50.32 |
| 1800. | 40.47 | 279.4 | 249.2 | 54.34 |
| 1900. | 40.98 | 281.6 | 250.8 | 58.42 |
| 2000. | 41.44 | 283.7 | 252.4 | 62.54 |
| 2100. | 41.86 | 285.7 | 254.0 | 66.70 |
| 2200. | 42.25 | 287.7 | 255.5 | 70.91 |
| 2300. | 42.60 | 289.6 | 256.9 | 75.15 |
| 2400. | 42.92 | 291.4 | 258.3 | 79.43 |
| 2500. | 43.20 | 293.2 | 259.7 | 83.74 |
| 2600. | 43.45 | 294.9 | 261.0 | 88.07 |
| 2700. | 43.66 | 296.5 | 262.3 | 92.42 |
| 2800. | 43.85 | 298.1 | 263.5 | 96.80 |
| 2900. | 44.01 | 299.6 | 264.7 | 101.2 |
| 3000. | 44.15 | 301.1 | 265.9 | 105.6 |
| 3100. | 44.26 | 302.6 | 267.1 | 110.0 |
| 3200. | 44.34 | 304.0 | 268.2 | 114.5 |
| 3300. | 44.41 | 305.3 | 269.3 | 118.9 |
| 3400. | 44.45 | 306.7 | 270.4 | 123.3 |
| 3500. | 44.47 | 308.0 | 271.5 | 127.8 |
| 3600. | 44.48 | 309.2 | 272.5 | 132.2 |
| 3700. | 44.47 | 310.4 | 273.5 | 136.7 |
| 3800. | 44.45 | 311.6 | 274.5 | 141.1 |
| 3900. | 44.42 | 312.8 | 275.4 | 145.6 |
| 4000. | 44.37 | 313.9 | 276.4 | 150.0 |
| 4100. | 44.32 | 315.0 | 277.3 | 154.4 |
| 4200. | 44.26 | 316.1 | 278.2 | 158.9 |
| 4300. | 44.19 | 317.1 | 279.1 | 163.3 |
| 4400. | 44.11 | 318.1 | 280.0 | 167.7 |
| 4500. | 44.04 | 319.1 | 280.9 | 172.1 |
| 4600. | 43.96 | 320.1 | 281.7 | 176.5 |
| 4700. | 43.88 | 321.0 | 282.5 | 180.9 |
| 4800. | 43.80 | 321.9 | 283.3 | 185.3 |
| 4900. | 43.73 | 322.8 | 284.1 | 189.7 |
| 5000. | 43.66 | 323.7 | 284.9 | 194.0 |
| 5100. | 43.59 | 324.6 | 285.7 | 198.4 |
| 5200. | 43.54 | 325.4 | 286.4 | 202.8 |
| 5300. | 43.49 | 326.3 | 287.2 | 207.1 |
| 5400. | 43.45 | 327.1 | 287.9 | 211.5 |
| 5500. | 43.43 | 327.9 | 288.6 | 215.8 |
| 5600. | 43.42 | 328.7 | 289.3 | 220.1 |
| 5700. | 43.42 | 329.4 | 290.0 | 224.5 |
| 5800. | 43.44 | 330.2 | 290.7 | 228.8 |
| 5900. | 43.48 | 330.9 | 291.4 | 233.2 |
| 6000. | 43.54 | 331.7 | 292.1 | 237.5 |
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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