A coffee cup calorimeter with a heat capacity of 6.00 J/∘6.00 J/∘C was used to measure the change in enthalpy of a precipitation reaction. A 50.0 mL50.0 mL solution of 0.330 M AgNO30.330 M AgNO3 was mixed with 50.0 mL50.0 mL of 0.420 M KI.0.420 M KI. After mixing, the temperature was observed to increase by 4.34∘C.4.34∘C. Calculate the enthalpy of reaction, Δ?rxn,ΔHrxn, per mole of precipitate formed (AgI).(AgI). Assume the specific heat of the product solution is 4.15 J / (g⋅∘C)4.15 J / (g⋅∘C) and that the density of both the reactant solutions is 1.00 g/mL.1.00 g/mL. Calculate the theoretical moles of precipitate formed from AgNO3AgNO3 and KI.KI. moles of precipitate formed from AgNO3:AgNO3:   mol moles of precipitate formed from KI:KI:   mol Calculate the heat change experienced by the calorimeter contents, ?contents.qcontents. ?contents=qcontents=   J Calculate the heat change expierenced by the calorimeter contents, ?cal.qcal. ?cal=qcal=   J Calculate the heat change produced by the solution process, ?solution.qsolution. ?solution=qsolution=   J Calulate Δ?solutionΔHsolution for one mole of precipitate formed. Δ?solution=

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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.