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Thermodynamic properties of silicides IV. Molar heat capacity at temperatures from 7 K to 340 K and derived thermodynamic properties toT= 2200 K of molybdenum disilicide (MoSi2.067 ± 0.002)

✍ Scribed by Jane E. Callanan; Ron D. Weir; Edgar F. Westrum; Jr

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
243 KB
Volume
28
Category
Article
ISSN
0021-9614

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✦ Synopsis

The molar heat capacity of molybdenum disilicide MoSi2.06720.002 was measured from T = 7 K to T = 340 K by adiabatic calorimetry. Our results show that no phase transition is present, but a slight anomaly was observed in the region of T = 200 K. From our results, the standard molar entropy D T 0 S°m(MoSi2.06720.002,cr)/R = 7.394, where T = 298.15 K; on the basis of this result, the function F°m(MoSi2.06720.002,cr,298.15 K)/R = 3.002. Heat capacities derived from transient heat-pulse calorimetry from T = 0.2 K to T = 7 K, and results from high-temperature adiabatic and drop calorimetry from T = 300 K to T = 2200 K, together with the heat capacities obtained in this work, allowed the estimation of thermodynamic functions to T = 2200 K.

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