Question

8-write as 5 marks answer
Write the Hess law and its application.
Or
Write the Ist law of Thermodynamics and explain its expression.​

Answer 1

Answer:

The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics is ΔU = Q − W. Here ΔU is the change in internal energy U of the system.