When 10.00 grams of cesium bromate is dissolved in 42.0 grams of water initially at a temperature of 25.00 ºC, the temperature of the solution decreases to 16.11 ºC. Calculate ΔHº for the reaction below in kJ/mol. [You may assume that the reaction takes place inside a perfect calorimeter and that the specific heat capacity of the solution formed is the same as for pure water. Calculate ΔHº for the reaction below in kJ/mol. CsBrO3 (s) ➝ Cs+ (aq) + BrO3 – (aq) ΔHº= ?
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.
When 10.00 grams of cesium bromate is dissolved in 42.0 grams of water initially at a temperature of 25.00 ºC, the temperature of the solution decreases to 16.11 ºC. Calculate ΔHº for the reaction below in kJ/mol.
[You may assume that the reaction takes place inside a perfect calorimeter and that the specific heat capacity of the solution formed is the same as for pure water.
Calculate ΔHº for the reaction below in kJ/mol.
CsBrO3 (s) ➝ Cs+ (aq) + BrO3 – (aq) ΔHº= ?
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