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Nitrous acid


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

View table.

Temperature (K) 298. - 1200.1200. - 6000.298. - 2000.2000. - 6000.
A 24.8997473.6513737.7902079.10390
B 91.375634.85498854.228201.667420
C -64.84614-0.921409-27.25140-0.263444
D 17.920070.0608375.1009900.014898
E -0.134737-9.111790-0.510291-15.04800
F -88.13596-119.3896-93.99160-130.3780
G 254.2671310.3440277.0960311.3580
H -76.73498-76.73498-78.82660-78.82660
ReferenceChase, 1998Chase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in June, 1963 Data last reviewed in June, 1963 Data last reviewed in June, 1963 Data last reviewed in June, 1963

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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