Nitric acid

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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
Δfgas-32.101kcal/molReviewChase, 1998Data last reviewed in June, 1963
Quantity Value Units Method Reference Comment
gas,1 bar63.669cal/mol*KReviewChase, 1998Data last reviewed in June, 1963

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) 298. to 1200.1200. to 6000.
A 4.69223023.29340
B 36.797301.297701
C -27.68590-0.246101
D 7.8584020.016241
E -0.059540-2.938131
F -35.10559-46.00650
G 59.2028982.17139
H -32.09990-32.09990
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1963 Data last reviewed in June, 1963

Phase change 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.

Data compiled by: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Reference Comment
9.23312.Holeci, 1966Based on data from 273. to 356. K.

References

Go To: Top, Gas 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]

Holeci, 1966
Holeci, I., Chem. Prum., 1966, 16, 5, 267. [all data]


Notes

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