The following reaction: 2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l)was studied in a coffee cup calorimeter. In the experiment, 100. mL portions each of 1.00 M aqueous NaOH and H2SO4, each at 24.0°C were mixed. The maximum temperature achieved was 30.6°C. Neglect the heat capacity of the cup and the thermometer, and assume the solution of products has a density of 1.00 g/mL and a specific heat capacity of 4.18 J/g K.What is the heat of reaction, (Delta)Hrxn, for the reaction as written in kJ?
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.
was studied in a coffee cup calorimeter. In the experiment, 100. mL portions each of 1.00 M aqueous NaOH and H2SO4, each at 24.0°C were mixed. The maximum temperature achieved was 30.6°C. Neglect the heat capacity of the cup and the thermometer, and assume the solution of products has a density of 1.00 g/mL and a specific heat capacity of 4.18 J/g K.
What is the heat of reaction, (Delta)Hrxn, for the reaction as written in kJ?
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