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Vapor pressure measurements of arsenic and arsenic trioxide over condensed phases

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Journal of Phase Equilibria

Abstract

The solid-vapor relations for arsenic in the temperature range from 680 to 840 K and the liquid-vapor relations for arsenic trioxide in the temperature range from 650 to 740 K were determined by direct vapor pressure measurements carried out with a quartz gauge. The resulting InP (total) vsT are : InP (atm) = 2545.1/T + 22.27 InT− 154.02 (for arsenic) and InP (atm) = −50983/T + 6.869 (for arsenic trioxide). Calculated enthalpy of vaporization (ΔHv,T 0) for arsenic trioxide and enthalpy of sublimation (ΔHs,298 0) for arsenic are 42.36 kJ/mol and 156.13 kJ/mol, respectively.

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Authors and Affiliations

  1. Institute for Metals Research Polish Academy of Sciences, 25 Reymonta St, 30- 059, Krakow, Poland

    A. Lisak & K. Fitzner

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  1. A. Lisak
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  2. K. Fitzner
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Lisak, A., Fitzner, K. Vapor pressure measurements of arsenic and arsenic trioxide over condensed phases. JPE 15, 151–154 (1994). https://doi.org/10.1007/BF02646358

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  • DOI: https://doi.org/10.1007/BF02646358

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