Earl M. Woolley

Heat capacities of aqueous nitric acid, sodium nitrate, and potassium nitrate at 298.15 K: ΔCpo of ionization of water

Abstract We have made calorimetric measurements leading to apparent molar heat capacities at constant pressure of dilute aqueous solutions of HNO 3 , NaNO 3 , and KNO 3 at 298.15 K. Results have been used to derive C p , φ o = −72.1 J K −1 mol −1 for HNO 3 (aq), C p , φ o = −28.9 J K −1 mol −1 for NaNO 3 (aq), and C p , φ o = −59.8 J K −1 mol −1 for KNO 3 (aq). These C p , φ o values are combined with others previously published to obtain a “best” ΔC p o = −215 J K −1 mol −1 for ionization of water at 298.15 K.

Heat capacities of aqueous perchloric acid and sodium perchlorate at 298°K: ΔC p o of ionization of water

We have used a Picker flow calorimeter for measurements leading to apparent molal heat capacities of dilute aqueous solutions of HClO4 and NaClO4 at 298°K. Results have been used to derive φc°=−27.1J-°K−1-mole−1 for HClO4 (aq.), φc°=15.2J-°K−1-mole−1 for NaClO4 (aq.), and ΔCp=−213.8J-°K−1-mole−1 for ionization of water.

Thermochemistry of compounds and aqueous ions of copper

Abstract We have gathered, evaluated, and tabulated thermodynamic and electrochemical quantities for compounds and aqueous ions of copper, along with equilibrium constants for chemical reactions. We have been explicit about the sources of data and our treatments of data so that interested readers can check the steps leading to tabulated thermodynamic quantities and thus form their own opinions about reliability and accurary.

Thermodynamics of Ionization of Nitroethane in Water-Ethanol Solvent Mixtures

We have made glass electrode measurements that lead to values for the equilibrium constant for acid ionization of nitroethane in water and in aqueous ethanol mixed solvent systems. Calorimetric measurements have led to ΔH0 values for the acid ionization of nitroethane in water and in aqueous ethanol. These results have been combined to yield TΔS0 values for the ionization reactions in water and in aqueous ethanol. Our results have also been combined with previously reported equilibrium constants for ionization of water in aqueous ethanol to obtain thermodynamic data for the neutralization of nitroethane in the various solvent systems.