Laws of Thermodynamics

There are four laws of thermodynamics as follows:
 Zeroth law of thermodynamics:

When two systems are each in thermal equilibrium with a third system, then the two systems are also in thermal equilibrium with one another.

First law of Thermodynamics:
  • The heat and mechanical work are mutually convertible. 
∂Q =∂W
  • The energy can neither be created nor destroyed through it can be transformed from one form to another. 
Second law of thermodynamics:
  • Kelvin-Plank Statement: It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy from a single thermal reservoir into an equivalent amount of work.
  • Clausius Statement: It is impossible for a self acting machine working on a cyclic process, to transfer heat from a body at a lower temperature to a body at a higher temperature without the aid of an external agency.
Third law of thermodynamics:
     The entropy of any pure substance is thermodynamics equilibrium approaches zero as the temperature approaches zero.

No comments:

Post a Comment

Popular Posts