Question

Among the following the state function is:

• A. Heat at constant volume
• B. Work in adiabatic process
• C. Internal energy
• D. All of the above

Answer 1

The correct option is D All of the above

The thermodynamic properties whose values depends only on the initial and final states of the system are known as state function.
From first law,
$\Delta U=q+W$
at constant volume $W=0$.
Hence $\Delta U=q$ since internal energy is a state function, heat at constant volume is a state function.
In adiabatic process, q =0
Hence $\Delta U=W$, since internal energy is a state function, work in adiabatic process is a state function.