The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is (are) correct?

Options

A. `T_(1)=T_(2)`
B. `T_(3) gt T_(1)`
C. `W_("isothermal") gtW_("adiabatic")`
D. `Delta U_("isothermal") gt Delta U_("adiabatic")`

Answer

A, D

Explanation

(A) `T_(1)=T_(2)` (due to isothermal)
(B) `T_(3) gtT_(1)` (incorrect) cooling will take place in adiabatic expansion)
(C )`W_("isothermal") gt W_("adiabatic")` { with sing, this is incorrect}
(D) `Delta U_("isothermal")=0 gt Delta U_("adiabatic")= -ve`
So, answer is `(A,D)`