first law of thermodynamics for a closed system can be characterized in words as a change in energy in a system zero.
The first law of thermodynamics, also known as the law of conservation of energy, states that energy can neither be created nor destroyed, but it can be changed from one form to another. According to this law, some heat given to the system is used to change the internal energy while the rest is used in doing work by the system.
The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system , plus the net work done on the system .
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