Question

Define first law of Thermodynamics and it's Importance.

Answer 1

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamicsystems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.

Answer 2

The first law defines that energy can be neither destroyed nor created.