Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if you can. Change During an exothermic chemical reaction, a solid is consumed and a gas produced. A gas condenses to a liquid, neither absorbing nor releasing heat. A solid precipitates from a solution, absorbing heat as it does so. Is this change spontaneous? Yes. O No. O Can't decide with information given. Yes. O No. O Can't decide with information given. Yes. O No. O Can't decide with information given.
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.
Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed by the system. In this question, it has been asked about spontaneity of reaction.
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