Which of the following is incorrect? A. Energy can be converted from one form to another but cannot be created nordestroyed. B. The change in the internal energy of a system is given by the sum of the heat that flows across its boundaries and the work done on the system by the surroundings. C. Enthalpy is the state or condition wherein the temperatures of the elements in a system are of equal values. D. The internal energy of a system is composed of the kinetic energy and the potential energy.
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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