sodium cyanide


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) 3000. - 6000.
A 14.27820
B 0.341647
C -0.068022
D 0.004655
E -0.840433
F 16.40510
G 72.99319
H 22.53010
ReferenceChase, 1998
Comment Data last reviewed in March, 1966
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
3000.14.7289.4976.8238.01
3100.14.7389.9777.2339.48
3200.14.7590.4477.6440.96
3300.14.7590.8978.0342.43
3400.14.7691.3378.4243.91
3500.14.7791.7678.7945.38
3600.14.7892.1879.1646.86
3700.14.7992.5879.5248.34
3800.14.7992.9879.8749.82
3900.14.8093.3680.2151.30
4000.14.8093.7380.5452.78
4100.14.8194.1080.8754.26
4200.14.8194.4681.1955.74
4300.14.8194.8181.5057.22
4400.14.8295.1581.8158.70
4500.14.8295.4882.1160.18
4600.14.8295.8182.4061.67
4700.14.8396.1282.6963.15
4800.14.8396.4482.9764.63
4900.14.8396.7483.2566.11
5000.14.8397.0483.5267.60
5100.14.8497.3483.7969.08
5200.14.8497.6284.0570.57
5300.14.8497.9184.3172.05
5400.14.8498.1884.5773.53
5500.14.8598.4684.8275.02
5600.14.8598.7285.0676.50
5700.14.8598.9985.3077.99
5800.14.8599.2485.5479.47
5900.14.8699.5085.7880.96
6000.14.8699.7586.0182.44

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