The symbol AH represents enthalpy change Select one: O True False In a closed system, at 25°C and 1 atmosphere of pressure, a small sample of methane is combusted. All of the methane is reacted according to the following equation: CH4(9)+ 20₂(g) → CO₂(g) + 2H₂O(1) In order to determine the enthalpy change of the system, must be assumed that the products are also at 25°C and 1 atmosphere of pressure. Select one: O True O False In Question 11, the kinetic energy of the products will be the same as the kinetic energy of the reactants. Select one: O True False
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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