Objective To visualize work done by the heat. Introduction Heat can be used to do work i.e., heat is a form of energy. Apparatus glass bottle with small opening, a coin Procedure Add some water in the bottle. Place a wet coin on its mouth. Rub your palms vigorously and hold the bottle between them. Closely watch the coin. It jumps (a bit) up and down for a few times. Discussion Air inside the bottle is cool. When it is brought between the palm, air inside the bottle gradually starts warming up. It expands and looks for an outlet. Pushing the coin it makes an escape. Observation:
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.
Step by step
Solved in 3 steps with 2 images
