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EXPERIMENT 5 - CHM170L/B41/GroupNo.6 P HYS ICAL CHE M ISTRY...

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MAPUA INSTITUTE OF TECHNOLOGY School of Chemical Engineering and Chemistry CHM170L / B41 / Group No. 6 PHYSICAL CHEMISTRY LABORATORY Experiment No. 5 HEAT OF SOLUTION TAN, Aieocellis F. TANGARA, Neil Patrick P. VELASCO, Christel Charmaine D. VILLAFLOR, Arthur C. ABSTRACT
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MAPUA INSTITUTE OF TECHNOLOGY School of Chemical Engineering and Chemistry CHM170L / B41 / Group No. 6 This experiment intends to determine the enthalpy of solution of ionic solutions in water. Chloride salts of Sodium, Ammonium, and Calcium have been employed as the subject of study. The effects of the type of ionic bond involved whether cationic or anionic on the enthalpy of solution shall be investigated in this experiment. Also, the determination of the effect of concentration on the heat of solution shall be taken in this experiment. The results show that when the breaking of bonds involved required a larger amount of energy than that of hydration, the process maybe deemed to be as endothermic and exothermic if otherwise. The reason for such shall be discussed in this report. Introduction The objectives of this experiment are to determine the heat of solution of common salts namely, sodium chloride, ammonium chloride and calcium chloride using Solution Calorimeter and to determine the effect of concentration in the heat of solution.We say that enthalpy change of solution (or enthalpy of dissolution) is the enthalpy change when one mole of a substance is dissolved completely in a large volume of a solvent at constant pressure.Enthalpy is the stored chemical energy of matter mainly in the virtue of their bond energies. It is a fact that when a chemical reaction occurs, a change in energy is also taking place. We hardly determine absolute enthalpy for it is hard to measure but changes in enthalpy in reactions are easily measured. It is because there is an
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