A heat engine is a system that converts heat into mechanical work. A heat "source" generates thermal energy that brings a workingsubstanceto 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 Vat each point is as given belowFig-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 DeltaE for the paths (i) 2 rarr 2"" (ii) 2 rarr 3""(iii) 3rarr 4 "" (iv) 4 rarr 1 The heal engine depicted in this problem is a 'camot heat engine' and the themodynamic cycleof operationsof this engine is known as a 'camot cycle' named after Saudi camot , an engine cum thermodynamist . The efficiency of a camot engine as (1-T_(1)//T_(2)) where T_(1) and T_(2) are the temperature of the sink and the source.