3 March 2016

Laws of Thermodynamics | Definition and Laws

There are 4 laws to thermodynamics and all are the most important laws in physics as well as thermodynamics. Laws are the foundation of heat transfer and energy work. 

When an engineer is designing or implementing a system, the consideration of heat loss or energy produced is influenced by these fundamental principles. 

The laws of thermodynamics were born during the industrial revolution of the 19th century in the United Kingdom and Europe.

The laws are as follows.
  • Zeroth Law of Thermodynamics : 
If two thermodynamic systems each are in thermal equilibrium with each other and with third one too.
  • First Law of Thermodynamics : 
It is not possible to create or destroy energy that can only alter forms. The universe's complete energy stays the same in any process. The net heat provided to the system is equal to the network provided by the model for a thermodynamic cycle.
  • Second Law of Thermodynamics :
An isolated system's total entropy can never decrease over time. The total entropy of a system and its surroundings can remain constant in ideal cases where the system is in thermodynamic equilibrium. 
  • Third Law of Thermodynamics : 
The entropy of a system approaches a constant minimum as the temperature approaches absolute zero.