Potential energy diagram for an endothermic reaction 1)What happens when Ammonium Nitrate is dissolved in water? (Use Reference table T) 2) A potential energy diagram for the above reaction would look similar to the one shown below. Explain why. 250 200 PE (kJ) 150 100 50 Reaction pathway the above diagram to answer the following Questions : a) Does the graph represent an endothermic or exothermic reaction?
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.
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