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Excess thermodynamic properties of (2-ethoxyethanol  +  1,4-dioxane or 1,2-dimethoxyethane) at temperatures between (283.15 and 313.15) K

✍ Scribed by Hiroyuki Ohji; Katsutoshi Tamura; Hideo Ogawa

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
189 KB
Volume
32
Category
Article
ISSN
0021-9614

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✦ Synopsis

Measurements of the excess enthalpies H E at T = 298.15 K and densities at 15 K intervals from T = (283.15 to 313.15) K are reported for (2-ethoxyethanol + 1,4-dioxane or 1,2-dimethoxyethane). Excess volumes V E , excess thermal expansivities Ξ± E , and the pressure derivatives of the excess enthalpies were estimated from the measured densities. The values of H E for both systems are positive. However, the values of V E for the 1,2-dimethoxyethane system are negative, although they are positive for the 1,4-dioxane system as expected from the sign of H E . The behaviour of these properties is discussed in terms of hydrogen bonds and size and shape of the ether molecules.

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