Carbon monoxide is carried around a closed cycle abc, in which bc is an isothermal process, as shown in the figure. The gas absorbs 7000 J of heat, as its temperature is increased from 300K to 1000K in going from a to b. The quantity of heat rejected by the gas during the process ca is
From a to b heat absorbed =
nR = 4
In the process c to a at constant pressure temperature decreases from 1000 to 300 K.