e jodard anoitouts Help Review Canstants Periodic Table For a certain chemical reaction. A H --35,8 kJ and AS-80.OJ/K. • Part A Is the reaction exothemic or endothermic? exothermic endothermic Previ Anwer v Correct A negative enthalpy value indicates that energy is released by the system. Therefore, the reaction is exothemic • Part B Does the reaction lead to an increase or decrease in the disorder of the system? increase decrease Previous Answie v Correct The sign of the entropy change is negative, which indicates that the disorder, or entropy of the system has decreased • Part C Calculate AG for the reaction at 290 K. Express your answer using two significant figures. Templane redo teset AG- 7.98 Submit Prevdoun Answe RAuntaner X Incorrect; Try Again; 4 attempts remaining
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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