Consider the reaction2H2+O2⟶2H2OΔ?rxn=−484kJWhich answer best describes the transfer of heat that occurs when 1.60 mol H2 reacts?774 kJ absorbed484 kJ absorbed387 kJ released774 kJ released387 kJ absorbed484 kJ released
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.
Consider the reaction
2H2+O2⟶2H2OΔ?rxn=−484kJ
Which answer best describes the transfer of heat that occurs when 1.60 mol H2 reacts?774 kJ absorbed
484 kJ absorbed
387 kJ released
774 kJ released
387 kJ absorbed
484 kJ released
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