An otto engine has a cylinder bore of 50mm, stroke of 75mm and clearance volume of 21.3 cubic centimeter. if the process of compression is isothermal and reversible and air at 1 bar is compressed to 9 bar and a temperature of 800c. find the efficiency of the engine, the carnot efficiency. is this engine feasible one.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.