ditantalum pentaoxide


Condensed phase thermochemistry data

Go To: Top, 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
Δfliquid-467.777kcal/molReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
liquid,1 bar43.757cal/mol*KReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
Δfsolid-489.001kcal/molReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
solid34.144cal/mol*KReviewChase, 1998Data last reviewed in December, 1972

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 2058. - 5000.
A 58.00010
B -1.139211×10-8
C 2.930522×10-9
D -2.538060×10-10
E -9.682849×10-9
F -503.4739
G 85.52971
H -467.7761
ReferenceChase, 1998
Comment Data last reviewed in December, 1972

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. - 2058.
A 31.54300
B 19.12700
C -8.101521
D 1.262060
E -0.388557
F -500.5079
G 64.77679
H -489.0000
ReferenceChase, 1998
Comment Data last reviewed in December, 1972

References

Go To: Top, 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

Go To: Top, Condensed phase thermochemistry data, References