Calculate the heat of neutralization (kJ/mole) for the reaction of 50.0 mL of 0.177 M potassium hydroxide with 100.0 mL 0.841 M sulfuric acid resulting in a temperature increase of 4.61 °C. Assume the solutions have a density of water and specific heat capacity of water, 4.184 J/(g-C). The calorimeter is a perfect system with no heat loss. 2KOH + H,SO, K;SO, + 2H,0 -327 k/mole O +34,4 k/mole O +2890 kJ/mole O -34.4 kJ/mole O +109 k/mole O -218 kJ/mole O -2890 kJ/mole +218 kJ/mole -109 kl/mole -654 k/mole O +327 kJ/mole O +654 kJ/mole
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.
Calculate the heat of neutralization (kJ/mole) for the reaction of 50.0 mL of 0.177 M potassium hydroxide with 100.0 mL 0.841 M sulfuric acid resulting in a temperature increase of 4.61 oC. Assume the solutions have a density of water and specific heat capacity of water, 4.184 J/(g⋅oC). The calorimeter is a perfect system with no heat loss.
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