barium oxide, obtained by calcining witherite


Gas phase thermochemistry data

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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
Δfgas-123.85kJ/molReviewChase, 1998Data last reviewed in June, 1974
Quantity Value Units Method Reference Comment
gas,1 bar235.45J/mol*KReviewChase, 1998Data last reviewed in June, 1974

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) 5000. to 6000.
A -1251.230
B 506.9240
C -68.96210
D 3.194891
E 2905.900
F 2971.970
G 616.0870
H -123.8460
ReferenceChase, 1998
Comment Data last reviewed in June, 1974

Condensed phase thermochemistry data

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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
Δfliquid-491.63kJ/molReviewChase, 1998Data last reviewed in June, 1974
Quantity Value Units Method Reference Comment
liquid,1 bar96.54J/mol*KReviewChase, 1998Data last reviewed in June, 1974
Quantity Value Units Method Reference Comment
Δfsolid-548.10kJ/molReviewChase, 1998Data last reviewed in June, 1974
Quantity Value Units Method Reference Comment
solid72.05J/mol*KReviewChase, 1998Data last reviewed in June, 1974

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) 2286. to 5000.
A 66.94400
B 0.000002
C -3.301011×10-7
D 1.464401×10-8
E 0.000004
F -525.6580
G 156.3120
H -491.6270
ReferenceChase, 1998
Comment Data last reviewed in June, 1974

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. to 2286.
A 47.42730
B 13.13620
C -3.796501
D 0.725938
E -0.336757
F -563.9310
G 123.7920
H -548.1040
ReferenceChase, 1998
Comment Data last reviewed in June, 1974

References

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


Notes

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