A system goes from A to B via two processes I and II as shown in Fig. If `Delta U_(1) and Delta U_(2)` are the changes in internal energies in the processes I and II respectively, then :

Options

A. `Delta U_(2) lt Delta U_(1)`
B. `Delta U_(2) gt Delta U_(1)`
C. relation between `Delta U_(1) and Delta U_(2)` cannot be determined
D. `Delta U_(1) =Delta U_(2)`

Answer

D

Explanation

`Delta U` is a state function. So, `Delta U_(1) and Delta U_(2)` depend only upon initial and final positions.
`therefore Delta U_(1) =Delta U_(2)`
`therefore` Correct choice is (d).