QS Study

Significance of Entropy

The thermal property that remains constant in an adiabatic process is called entropy. Alternately, entropy is the physical property of the body that remains constant in an adiabatic process. Entropy is a measure of the part that cannot be used to do work. So entropy is useful in that it provides the information regarding structural changes accompanying a given process. In a way, entropy is useful for knowing the efficiency of the internal energy of something.

Entropy is very significant in thermodynamics. The significances are mentioned below:

  • Entropy is a physical quantity. It is equal to the ratio of heat absorbed or rejected to the temperature.
  • It indicates the direction of heat flow.
  • It helps in determining the thermodynamic state of an object.
  • Like temperature, pressure, volume, internal energy, magnetic behavior it expresses the state of a body.
  • The orderliness of an object decreases with the increase of entropy.
  • Like temperature or pressure, it cannot be felt.

Entropy is the measure of the disorder or randomness in a system. In other words, if you drop a box of matches on the floor, the matches will fall all over the place, which is an increase in entropy.