Definition of First Law Of Thermodynamics



It is also named the law of conservation of energy. It states that energy can never be created and it cannot be destroyed too. It can only be transferred from one form of energy to the other. It is expressed by the sum of flowing energy and the work that is being done by the surroundings on the system.

 


This law explains the two processes i.e., heat and work which lead to the change in the internal energy of the system. Moreover, if the heat flows into the system and the work is done by the surroundings, then the internal energy of the system increases and vice versa. 

 

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