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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Deltafgas179.08kJ/molReviewChase, 1998Data last reviewed in December, 1970
Quantity Value Units Method Reference Comment
gas,1 bar170.25J/mol*KReviewChase, 1998Data last reviewed in December, 1970

Gas Phase Heat Capacity (Shomate Equation)

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) 2119. - 4000.4000. - 6000.
A -623.2170769.8080
B 429.6010-284.4590
C -97.0137041.36660
D 7.474060-2.129091
E 488.2030-1693.040
F 1076.760-1665.750
G 18.96410-26.29590
H 179.0750179.0750
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1970 Data last reviewed in December, 1970

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Deltafliquid4.99kJ/molReviewChase, 1998Data last reviewed in December, 1970
Quantity Value Units Method Reference Comment
liquid,1 bar66.33J/mol*KReviewChase, 1998Data last reviewed in December, 1970
Quantity Value Units Method Reference Comment
solid62.48J/mol*KReviewChase, 1998Data last reviewed in December, 1970

Liquid Phase Heat Capacity (Shomate Equation)

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) 1000. - 2118.599
A 55.01420
B -18.68350
C 2.757440
D 1.284171
E 3.022340
F -8.417321
G 134.9770
H 4.985180
ReferenceChase, 1998
Comment Data last reviewed in December, 1970

Solid Phase Heat Capacity (Shomate Equation)

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. - 583.583. - 768.768. - 1000.
A 83.8018076.7154026.15520
B -406.1860-187.587028.60140
C 915.0660295.7110-23.68360
D -519.8050-113.93206.952170
E -0.191854-4.3444801.041351
F -14.63140-25.55610-5.801120
G 247.8400188.932089.99550
H 0.0000000.0000000.000000
ReferenceChase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in December, 1970 Data last reviewed in December, 1970 Data last reviewed in December, 1970

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
1257. - 1911.4.081887599.352-45.737Stull, 1947Coefficents calculated by NIST from author's data.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, 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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References