Question

What is the application of the First Law of Thermodynamics?

Answer 1

In this way you can find many applications of first law, if you understand it properly. The first law of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic processes: The first law makes use of the key concepts of internal energy, heat, and system work

Answer 2

$\textbf{Answer is in Attachment !!}$


In Adiabatic process...

Gas expands [dQ = +ve]. The temperature falls. [dQ = +ve]

Gas compress then temperature increases [dQ = -ve].