QUESTION 9 Which of the following statements is true? O A. The smallest mass of reactant in a chemical reaction is always that of the limiting reactant. When comparing the amount of a product that can be formed from each reactant, the limiting reactant is the reactant that would produce O B. the largest amount of product. O C. The limiting reactant is the reactant that is completely consumed in a chemical reaction. O D. All of the above are true.
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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