Two solutions, 100.0 mL of 1.60 M HCl and 120.0 mL of 1.00 M NaOH, both initially at 22.0°C, are mixed in a coffee cup calorimeter. The temperature rises to 28.7°C. Assume the density of the solution is the same as the density of water. Knowing that 0.120 moles of water form, determine the heat of the neutralization reaction (expressed per mole of water formed) using the following information: qsolution solution Csolution AT 4.184 J/g C -45.6 kJ/mole H₂O -51.4 kJ/mole H₂O -60.6 kJ/mole H₂O -6.17 kJ/mole H₂O -49.6 kJ/mole H₂O density of NaCl solution - 1.00 g/mL Cs, water(1)
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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