In a boiler, heat is transferred from the products of combustion to the steam. the temperature of the products of combustion decreases from 1100oc to 550oc while the pressure remains constant at 0.1 mpa. the average constant pressure specific heat of the products of combustion is 1.09 kj/kg-k. the water enters at 0.8 mpa, 150oc and leaves at 0.8 mpa, 250oc. determine the exergy destroyed for this process per kilogram of water evaporated.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.