State and five ways of enunciating the first law of thermodynamics.

1.	State and five ways of enunciating the first law of thermodynamics.
Answer» Solution :(i) Whenever energy of a particular type disappears equivalent amount of ANOTHER type must be produced. (ii) TOTAL energy of a system and surroundings remains constant ( or conserved ) (III) " Energy can neither be created nor destroyed, but may be converted from one from to another " (iv) " The change in the internet energy of a closed system is equal to the energy that passes through its boundary as heat or work ". (V) Heat and work are TWO ways of changing a system's internal energy " .

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