Posted On: Nov 19, 2020
PCBs or Polychlorinated Biphenyls or chlorinated hydrocarbons are a group of man-made chemicals that consist of carbon, hydrogen, and chlorine atoms. They are solid or oily liquid with yellow color and do not have any taste or smell. PCBs are resistant to both pressure and temperature. Because of this property, it is used in equipment like transformers and capacitors. They are also widely used in plasticizer, lubricants, hydraulic fluid, heat transfer fluid. PCBs construction was banned in 1979. PCBs are chemically stable, have a high boiling point, and non-flammable, which makes them useful in various industrial applications.
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The third law of thermodynamics states that a perfect crystal's entropy is always zero at absolute zero temperature. As the system does not contain the heat and all the atoms or molecules in the syste...