The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the f

Question

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?\

Professor PC Thomas Classes · Answer

(a, c, d) : a) $T_{1}=T_{2}$ as the process is isothermal. Hence, (a) is correct.\
b) $T_{3}<T_{1}$ because cooling takes place on adiabatic expansion. Hence (b) is incorrect.\
c) $w_{	ext {isothermal }}>w_{	ext {adiabatic }}$ because area under the isothermal curve is greater than under the adiabatic curve. Hence\
c) is correct.h\
d) $\Delta U_{	ext {adiabatic }}=-v e$ because when adiabatic expansion occurs, internal energy decreases. Thus, $\Delta U_{	ext {isothermal }}>$ $\Delta U_{	ext {adiabatic }}$. Hence (d) is correct.\