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    Thermodynamics of Inorganic Hydration and of Humidity Control, with an Extensive Database of Salt Hydrate Pairs

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    Fulltext not available
    Authors
    Glasser, Leslie
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Glasser, Leslie. 2014. Thermodynamics of Inorganic Hydration and of Humidity Control, with an Extensive Database of Salt Hydrate Pairs. Journal of Chemical & Engineering Data. 59 (2): pp. 526-530.
    Source Title
    Journal of Chemical & Engineering Data
    DOI
    10.1021/je401077x
    ISSN
    00219568
    URI
    http://hdl.handle.net/20.500.11937/4713
    Collection
    • Curtin Research Publications
    Abstract

    Water is ubiquitous, and its presence in the ambient humid air means that it may constitute an uncontrolled variable in chemical processes. Methods for humidity control may involve complete removal of water and its vapor by procedures such as evaporation under vacuum, use of drying agents such as silica gel, adjustment to a desired humidity by use of saturated aqueous solutions, or adjustment to a desired humidity by use of a pair of related salt hydrates (such as CuSO4·3H2O + CuSO4·5H2O). By the phase rule, the presence of three phases at a fixed temperature (in the latter two cases) ensures a constant equilibrium humidity. The thermodynamics of these chemical means of humidity controlis presented, together with a database of almost 300 salt hydrate pairs which may be considered for humidity control by mixing into the reaction medium. However, the possibility of interaction of the hydrates with the reaction medium should not be neglected.

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