WHAT I CAN D0 (PAGE 8) ACTIVITY 5: Answer the following questions. Write your answer on the answer sheet provided. Show your solution and answer. 1. Using this chemical equation. 3Na + AICla 3Naci + Al If 16 g Na and 8 g AICls are allowed to react, find a. the limiting reactant b. the excess reactant c. the grams of Al are formed in the chemical reaction. 2. Write the balanced chemical equation, when magnesium is reacted with silver nitrate forming magnesium nitrate and silver. a. If 18 g of magnesium reacts with 33 g of silver nitrate, determine the imiting reactant. b. Find the excess reactant in the given reaction. c. How much silver can be formed from the above chemical reaction?
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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