silicon nitride


Gas Phase Heat Capacity (Shomate Equation)

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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. - 1400.1400. - 6000.
A 5.4199415.292790
B 7.1512313.761611
C -5.667042-0.856061
D 1.7501700.061858
E 0.0099360.070821
F 87.1462087.90920
G 56.5381058.17051
H 89.0001089.00010
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1967 Data last reviewed in March, 1967
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
298.7.2151.8251.82-0.00
300.7.2151.8651.820.01
400.7.5553.9952.110.75
500.7.8455.7052.661.52
600.8.0857.1553.292.32
700.8.2758.4153.933.14
800.8.4359.5354.563.97
900.8.5560.5355.174.82
1000.8.6661.4355.755.68
1100.8.7762.2656.316.55
1200.8.8763.0356.847.43
1300.8.9963.7557.348.33
1400.9.1364.4257.829.23
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
1400.9.0964.4257.829.23
1500.9.2565.0558.2810.15
1600.9.4065.6558.7311.08
1700.9.5466.2359.1512.03
1800.9.6766.7759.5612.99
1900.9.7967.3059.9513.96
2000.9.9067.8160.3314.95
2100.10.0168.2960.7015.94
2200.10.1068.7661.0616.95
2300.10.1869.2161.4017.96
2400.10.2669.6561.7418.98
2500.10.3270.0762.0620.01
2600.10.3870.4762.3821.05
2700.10.4470.8662.6822.09
2800.10.4871.2462.9823.14
2900.10.5271.6163.2724.19
3000.10.5571.9763.5625.24
3100.10.5872.3263.8326.30
3200.10.6072.6564.1027.35
3300.10.6172.9864.3728.42
3400.10.6273.3064.6329.48
3500.10.6373.6064.8830.54
3600.10.6373.9065.1331.60
3700.10.6374.2065.3732.67
3800.10.6274.4865.6033.73
3900.10.6274.7565.8334.79
4000.10.6175.0266.0635.85
4100.10.5975.2866.2836.91
4200.10.5875.5466.5037.97
4300.10.5675.7966.7139.03
4400.10.5476.0366.9240.08
4500.10.5376.2767.1341.14
4600.10.5176.5067.3342.19
4700.10.4976.7267.5343.24
4800.10.4776.9567.7244.28
4900.10.4577.1667.9145.33
5000.10.4377.3768.1046.38
5100.10.4277.5868.2847.42
5200.10.4177.7868.4648.46
5300.10.3977.9868.6449.50
5400.10.3978.1768.8150.54
5500.10.3878.3668.9951.58
5600.10.3878.5569.1652.61
5700.10.3878.7369.3253.65
5800.10.3878.9169.4954.69
5900.10.3979.0969.6555.73
6000.10.4179.2769.8156.77

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