To obtain the largest possible amourt of heat from a chemical reaction in which there is a large increase in the number of moles of gas, should you cary out the reacte under conditions of constant volume or constant pressure? Complete the sentences to explain your answer Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help constant pressure A large increase in the number of moles of gas is an expansion, which relates to and all energy is released as heat has a value. constant volume Since the change in internal energy is equal to heat plus work (AE = q + tw) and w PAV more work is done at constant volume work (w) Thus, you should carry out the reaction under condtions of to obtain more heat negative heat (g) positive less energy is released overall

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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.