Two solutions (the system), each of 25mL volume and at25°C are mixed in a beaker. A reaction occursbetween them and the temerature rises to 35°C. After the products have equilibrated with the surroundings, thetemperatire is again 25°C and the total volume is50mL. No gases are involved in the reaction. Which oneof the following relationships concerning the change from initialto final states (both at 25°C) is true? a.) AE = 0 b.) ΔΗ = 0 c.) ΔΕ > 0 d.) w = 0 e.) q = 0
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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