calcium

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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
Δfgas42.5 ± 0.2kcal/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfgas42.495kcal/molReviewChase, 1998Data last reviewed in September, 1983
Quantity Value Units Method Reference Comment
gas,1 bar37.0189 ± 0.001cal/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar37.020cal/mol*KReviewChase, 1998Data last reviewed in September, 1983

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 1774. to 6000.
A 29.05043
B -17.91441
C 4.582290
D -0.334804
E -15.41907
F 10.09450
G 51.97108
H 42.49522
ReferenceChase, 1998
Comment Data last reviewed in September, 1983

References

Go To: Top, Gas phase thermochemistry data, Notes

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

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

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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