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Quartz (SiO2)


Solid 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.

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Temperature (K) 298. - 847.847. - 1996.
A -6.07659158.75340
B 251.675510.27925
C -324.7964-0.131384
D 168.56040.025210
E 0.0025480.025601
F -917.6893-929.3292
G -27.96962105.8092
H -910.8568-910.8568
ReferenceChase, 1998Chase, 1998
Comment quartz phase; Data last reviewed in June, 1967 quartz phase; Data last reviewed in June, 1967
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
298.44.5741.4441.47-0.01
300.44.7741.7441.470.08
400.53.4355.8743.345.01
500.59.6468.5047.1310.68
600.64.4279.8151.6516.89
700.68.7790.0656.4223.55
800.73.7099.5661.2230.67
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
847.67.42104.763.4734.93
900.67.95108.866.0238.51
1000.68.95116.070.6645.36
1100.69.96122.675.0952.30
1200.70.96128.879.3159.35
1300.71.96134.583.3466.50
1400.72.97139.987.1873.74
1500.73.97144.990.8781.09
1600.74.98149.794.4088.54
1700.75.98154.397.7996.08
1800.76.99158.7101.0103.7
1900.77.99162.9104.2111.5

References

Go To: Top, Solid 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

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