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Heat capacity of potassium tungstates K2WnO3n + 1(n =  2, 3, 4) at temperatures from 273 K to 979 K

✍ Scribed by Q. Chen; S. Liu; P. Zhang

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
92 KB
Volume
31
Category
Article
ISSN
0021-9614

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✦ Synopsis

Compounds K 2 W n O 3n+1 (n = 2, 3, 4) were synthesized using a pyrometallurgical technique. The products were characterized by X-ray diffraction analysis and found to be single-phase compounds. The enthalpy increments T 273.15 K H o m of each compound were measured by a drop method using a high-temperature Calvet calorimeter HT-1000 in the temperature range (273 to 979) K {or T = (273 to 878) K for K 2 W 2 O 7 }. The expression for molar heat capacity of each compound against temperature was obtained from experiment results.

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