Question

Write the various definition of first law of thermodynamics.

Answer 1

First law of thermodynamics:

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