question_answer

A system goes from state A to B via two processes \[I\] and \[II\], as shown in Fig. How are \[\Delta {{U}_{1}}\]and \[\Delta {{U}_{2}}\] (the changes in internal energies in the processes \[I\] and \[II\]) related to each other? 

Answer:

                Since the initial and final states are same for both processes \[I\] and \[II\] and the change in internal energy is path independent, therefore, \[\Delta {{U}_{1}}=\Delta {{U}_{2}}\]