Abstract
Molar excess enthalpies for aqueous solutions of 2-methoxyethanol(ME), 2- ethoxyethanol(EE), 2-i-propoxyethanol(i-PE), and 2-i-butoxyethanol (i-BE) have been measured at 298.15 K over the whole composition range(except for ME) with an LKB flow microcalorimeter. All the solutions exhibit negative enthalpies of mixing, the absolute value of which decreases with the increase in the size of alkyl group. The enthalpic pair interaction parameter has been evaluated from the experimental data. It has fairly large positive value which increases with the size of alkyl group. The results are discussed in terms of Hydrophobic hydration and interaction.
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