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Thermodynamics Of Aqueous Solutions Of 1-Naphthyl Methylcarbamate, Miguel Angel Huerta Diaz

University of the Pacific Theses and Dissertations

Accurate solubility measurements for the pesticide l-naphthyl-N-methylcarbamate (carbaryl) in water, natural and artificial seawater, NaCl, Na₂SO₄, CaCl₂ and (CH₃)₄NBr, at different temperatures covering the range 5-45 °C, were obtained using a combination of the generator column method and absorption spectroscopy techniques. As a rule, it was found that the solubility of carbaryl in water and in the electrolyte solution increased with an increase in temperature.

The thermodynamic parameter ΔG°, ΔH°, ΔS°, and ΔC°_p at 298.15 K, for the dissolution process carbaryl(s) to carbaryl(aq) and carbaryl(s) to carbaryl(aq. elect.), were calculated …