Two positively charged spheres, each with a charge of 2.0 *10-5 C, a mass of 1.0 kg, and separated by a distance of1.0 cm, are held in place on a frictionless track. (a) Whatis the electrostatic potential energy of this system? (b) Ifthe spheres are released, will they move toward or awayfrom each other? (c) What speed will each sphere attainas the distance between the spheres approaches infinity?[Section 5.1]
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.
Two positively charged spheres, each with a charge of 2.0 *
10-5 C, a mass of 1.0 kg, and separated by a distance of
1.0 cm, are held in place on a frictionless track. (a) What
is the electrostatic potential energy of this system? (b) If
the spheres are released, will they move toward or away
from each other? (c) What speed will each sphere attain
as the distance between the spheres approaches infinity?
[Section 5.1]
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