Two heat engines operate in series between hot reservoir at 527°c and cold reservoir at 17°c. if both of the engines have the same efficiency and if the first engine rejects heat at about 400kj/kg to the second engine, determine: a) temperature where heat is supplied to the second engine b) heat taken from the hot reservoir. c) work done.

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.