Enthalpies of mixing of water and alkoxyethanols

John Enriquez, University of Texas at El Paso


Alkoxyethanols [CmH2m+1·(OC2H 4)·OH] (conveniently abbreviated to CmE1) are a subgroup of the alkyl poly(ethylene glycol) mono-ethers. They are small relatives of a large number of nonionic detergents. The thermodynamic properties of their mixing in water have been shown to be good sources of information about the interactions of both hydrophilic and hydrophobic groups with water. These alkoxyethanols, or glycol ethers, are the ether derivatives of ethylene glycol where one hydroxyl functional group is substituted for an alkoxy functional group. Our group has already published results for aqueous excess properties of 2-Methoxyethanol (C1E1), 2-Ethoxyethanol (C 2E1) and 2-Butoxyethanol (C4E1), 1,2 three more alkoxyethanols will be added to a list of calorimetric data, being collected, for these small alkoxyethanols3. The three amphiphiles used in this experiment are 2-Propoxyethanol (C3E 1), 2-Isopropoxyethanol (i-C3E1) and 2-Isobutoxyethanol (i-C4E1). Since limited thermodynamic information exists for these three liquids, supplemental data was needed. Excess enthalpy data collected for 2-Propoxyethanol (C 3E1) and 2-Isopropoxyethanol (i-C3 E1) were obtained with no problems. Data collected for 2-Isobutoxyethanol (i-C4E1) revealed some serious discrepancies from literature values.

Subject Area

Physical chemistry

Recommended Citation

Enriquez, John, "Enthalpies of mixing of water and alkoxyethanols" (2010). ETD Collection for University of Texas, El Paso. AAI1479555.