Thermodynamic properties of polymorphic phases of tetramethylsilane
β Scribed by Masana Harada; Tooru Atake; Hideaki Chihara
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 698 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0021-9614
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By means of a high pressure d&a. method, a new crystaliine phase of tetramethylsilane which forms below its melting point has been observed at pressures above 20 MPa. This is a verification of the prediction from earlier calorimetric data at ordinary pressures. l\_ Introduction Recent calorimetric [
Combustion calorimetry, solution calorimetry, and differential scanning calorimetry (DSC) were used to determine the standard (p β’ = 0.1 MPa) molar enthalpies of formation of Forms I, II, and III piracetam at 298.15 K, namely, f H β’ m (C 6 H 10 O 2 N 2 , cr I) = -520.6 Β± 1.6 kJβ’mol -1 , f H β’ m (C 6