rder to insure that the reactions you will study go to completion (so that all of the heat released or absorbed is transferred to or from water in the calorimeter), it is important that the reactants are mixed well. How will you mix the reactants in each part of this eriment? With the lid open, you will stir the contents of the calorimeter with a glass stirring rod. With the lid closed, you will use the thermometer as a stirring rod. With the lid closed, you will gently swirl the calorimeter cup so that the contents mix together. You will place the calorimeter in a centrifuge and spin it rapidly to insure that the contents are well mixed.
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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