Write the various definition of first law of thermodynamics.

Explanation

First law of thermodyanmics
(i)The total energy of an isolated system remains constant though it may change from one form to another
(ii) Whenever energy of a particular type disappears equivalent amount of another type must be produced .
(iii)Total energy of a system and surroundings remains constant.
(iv) Energy can neither be created nor destroyed, but may be converted from one form to another.
(v)The change in the internal energy of a closed system is equal to the energy that passes through its boundary as heat or work.
(vi) Heat and work are equivalent ways of changing a system.s internal energy.