laws of thermodynamics
laws of thermodynamics

What is thermodynamics?

Thermodynamics is one of the types of physics which is the combination of two words ” thermal + heat”, thermal means heat, and dynamic means motion. So literally thermodynamic means study of the motion of heat. There are three laws of thermodynamics which are:

Thermodynamic plays a vital role in our lives.
Without TD…..

  • We were not able to get the energy to move. We get energy from food as a result of the metabolism process which is the example or application of the first law of TD.
  • Refrigerators, air conditioners,  cars, airplanes, buses, ships all needed a thermodynamic system to work.
  • Heat pumps and heating systems are due to TD.
  • Electricity is now being produced by using a thermodynamic cycle or process.

It is applicable only in the macroscopic world and not in the microscopic.
Learning Objectives

  • State the Basic Postulates of the kinetic theory of gasses
  • Derive gas laws on the basis of kinetic theory
  • Internal Energy of an Ideal Gas
  • To understand the term work and heat in thermodynamics
  • Differentiate between isothermal and adiabatic processes
  • Explain the molar specific heat of a gas
  • Apply the first law of thermodynamics to derive Cp – Cv = R
  • Explain the second law of thermodynamics and its meaning in terms of entropy
  • Understand the concept of reversible and irreversible processes
  • Define the term heat engine
  • Understand and describe Carnot Theorem
  • Describe temperature scales
  • Describe the working of petrol and diesel engine
  • Explain the term entropy
  • Appreciate the environmental crisis as an entropy crisis.

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Laws of thermodynamics


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