At high temperatures, glass has a tendency to change its shape into a sphere. Assume that the surface potential energy of a glass at 680 °C is 0.2 J m2; if the glass changes from a cylinder of length 1 cm and diameter 30 µm into a sphere at this temperature. (a) Calculate the radius of the sphere. ..s] (b) Calculate the energy released during the process of glass changing from a cylinder to a sphere. [2...... (c) Explain why bubbles or droplets also have a tendency to form spherical shapes.
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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At high temperatures, glass has a tendency to change its shape into a sphere. Assume that
the surface potential energy of a glass at 680 °C is 0.2 J m2; if the glass changes from a
cylinder of length 1 cm and diameter 30 um into a sphere at this temperature.
(a) Calculate the radius of the sphere.
..s]
(b) Calculate the energy released during the process of glass changing from a cylinder to
a sphere.
[B
DRAVTA
(c) Explain why bubbles or droplets also have a tendency to form spherical shapes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcfb5bc21-1517-4349-be17-fa9e74fcbe83%2F194bf071-7d1b-4267-89e0-d0246487769c%2Fwmwf40l_processed.jpeg&w=3840&q=75)
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