A heat engine is a system that converts heat into mechanical work. A heat "source" generates thermal energy that brings a working substance to a high temperature. The working substance then generates work in the engine while transferring heat to a sink at a lower temperature . The working of a heat engine is shownn figure 1.
Heat engines can be modelled using themodynamic cycles. The heat engine given in Figure -2 is of a working substance which is 1.00 mol of a monoatomic ideal gas . The thermodynamic cycle begins at the point designated as '1' and goes clockwise and the values of P and l or V at each point is as given below Fig-2 `(P_(1)=1.00 atm " and " V_(1) = 24.6 L , P_(2)=2.00 atm , V_(3) =49.2L, P_(4)=1.00 atm)`
Calculate `T_(1),T_(2),T_(3) "and" T_(4)`

Answer

`1) T_(1)=300K`
`2) T_(2)=600K`
`3) T_(3) =1200K`
`4) T_(4) = 600K`