By Team Aakash Byju's
The First Law of Thermodynamics states that energy cannot be generated or destroyed; it can only be transferred or converted from one form to another.
It is that heat and work are both different forms of the same substance known as energy, which is conserved.
According to this law, a fixed quantity of heat is required to obtain a fixed amount of work or vice versa.
If the system gains or loses energy, the surrounding energy will also gain or lose the same amount of energy.
When one form of energy disappears, an exact equivalent amount of another form of energy must appear.