03.47: A monatomic ideal gas is used as the working substance for the Carnot 
xwcqn 9g.+ji9fukb(* 2 vx/w tcycle shown in the figure. Processes A → B and C → D are isothermal, whi
wvu(nfx/*wt 2i jk9c  g9.xb+qle processes B → C and D → A are adiabatic. During process A → B, there are 400 J of work done by the gas on the surroundings. How much heat is expelled by the gas during process C → D?