Description: This presentation is part of the faculty lecture series UNT Speaks Out on Water Conservation. In this presentation, the author discusses water conservation and sustainability.

Description: This document includes supporting information and figures for an article on the Abraham model correlations for solute partitioning into o-xylene, m-xylene and p-xylene from both water and the gas phase.

Description: This poster discusses an analysis of how business students engage in learning in an introductory data analysis course. A variety of pedagogical activities are used in this introductory data analysis course for business students. In fall of 2012, students were able to score points on each of the following activities: experiential group projects, clicker questions, learning modules, online post chapter quizzes, in class exams, and extra credit questions. An analysis was performed to determine how these activities relate to each other and to improvement in student grades.

Description: This article discusses the enthalpy of solvation correlations for organic solutes and gases dissolved in 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol. Abstract: Data have been assembled from the published literature on the enthalpies of solvation for 91 organic vapors and gaseous solutes in 2-propanol, for 73 gaseous compounds in 2-butanol, for 85 gaseous compounds in 2-methyl-1-propanol and for 128 gaseous compounds in ethanol. It is shown that an Abraham solvation equation with five descriptors can be used to correlate the experimental solvation enthalpies to within standard deviations of 2.24 kJ/mole, 1.99 kJ/mole, 1.73 kJ/mole and 2.54 kJ/mole for 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol, respectively. The derived correlations provide very accurate mathematical descriptions of the measured enthalpy of solvation data at 298 K, which in the case of ethanol span a range of 136 kJ/mole. Division of the experimental values into a training set and a test set shows that there is no bias in predictions, and that the predictive capability of the correlations is better than 3.5 kJ/mole.

Description: This article discusses the transfer of neutral molecules, ions and ionic species from water to benzonitrile; comparison with nitrobenzene. Equations have been constructed for the transfer of 64 neutral solutes from water and from the gas phase to the solvent benzonitrile. The equations contain five descriptors and can be used to predict further values of the water-benzonitrile and gas-benzonitrile partition coefficients for a wide range of solutes. The water-benzonitrile equation has been extended to include ions and ionic species derived from acids by loss of a proton and bases by acceptance of a proton. Only two further descriptors are needed, one for anions and one for cations. A previous equation for transfer of neutral solutes from water to nitrobenzene has also been extended to include ions and ionic species. Comparison of the equations for transfer to benzonitrile and to nitrobenzene shows that the two solvents behave quite similarly, although benzonitrile as a solvent is a stronger hydrogen bond base.