An effusion study of the vaporization behavior of copper bromides

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · High Temperature and Materials Science

OSTI ID:218637

Piacente, V; Basciani, S ^[1]; Ferro, D ^[2]

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1. Univ. La Sapienza, Rome (Italy). Dipt. di Chimica
2. CNR-Centro per la Termodinamica Chimica alle Alte Temperature, Rome (Italy)

The vaporization of CuBr{sub 2} and CuBr was studied by a torsion effusion apparatus. The CuBr{sub 2} in a first step decomposes according to the reaction: (1) 2CuBr{sub 2}(s) {yields} 2{alpha}CuBr(s) + Br{sub 2}(g), whereas CuBr vaporizes at higher temperature according to the predominant reaction: (2) 3CuBr(s) {yields} Cu{sub 3}Br{sub 3}(g). From the measured vapor pressures, the standard enthalpies of both reactions were obtained from second and third law: {Delta}H{degree}(298) = 105 {+-} 2 kJ/mol and {Delta}H{degree}(298) = 160 {+-} 6 kJ/mol for reactions (1) and (2), respectively, the last referred to {alpha}CuBr{sub 2}(s).

• OSTI ID: 218637
• Report Number(s): CONF-940468-; ISSN 1080-1278; TRN: IM9619%%358
• Journal Information: High Temperature and Materials Science, Vol. 34, Issue 1-3; Conference: 8. international conference on high temperature materials chemistry, Vienna (Austria), 4-9 Apr 1994; Other Information: PBD: Aug-Dec 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER BROMIDES
EVAPORATION
DECOMPOSITION
VAPOR PRESSURE
REACTION HEAT
BROMINE
MEASURING INSTRUMENTS