A heat enginge operates in the reversible cycle shown in the pVdiagram below. The temp of stat "a" is 300K. Process "bc" isisothermal. The engine contains 0.5 moles of an ideal gas workingsubstance in each cycle. Pressure at "b" is 400,000 Pa at "a" and"c" it is 100,000 Pa/
In one cyle abca the internal energy of the gas changes by howmany Kj?
