Thermochemistry of sodium triphosphate and sodium cyclotriphosphate transformations

Autor:	V. M. Galogaza, E. A. Prodan, S. G. Tereshkova
Rok vydání:	1989
Předmět:	Chemistry Sodium triphosphate Sodium chemistry.chemical_element Condensed Matter Physics medicine.disease Nitrogen chemistry.chemical_compound medicine Thermochemistry Physical chemistry Dehydration Physical and Theoretical Chemistry Instrumentation
Zdroj:	Thermochimica Acta. 142:265-280
ISSN:	0040-6031
DOI:	10.1016/0040-6031(89)85024-5
Popis:	Thermal transformations taking place on heating Na 5 P 3 O 10 · 6H 2 O, Na 5 P 3 O 10 ( II ) and Na 3 P 3 O 9 · 6H 2 O in dry nitrogen at 293–880K are investigated using DSC, TG and TLC methods. The obtained standard enthalpies of the main reactions and the constituent stages of reactions of the Na 5 P 3 O 10 ( II ) → Na 5 P 3 O 10 ( I ) transition are discussed. A universal formula for thermochemical calculations is proposed which allows the determination of thermodynamic characteristics for complex multistage and multicycle topochemical processes. The cyclic character of Na 5 P 3 O 10 · 6H 2 O dehydration is explained on the basis of a zonary mechanism of reaction which spreads through the crystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fe2664f37d9f4b6b39e12bbd54733816 https://doi.org/10.1016/0040-6031(89)85024-5 Zobrazit plný text záznamu