The room design cooling load is 3600 Btu/hr. The enthalpy of air leaving the cooling coil is 23 Btu/lbma. The room condition is 75 F db and humidity ratio of 0.01 lbmv/lbma. The air specific volume at 13.5 ft3/lbm. Determine the supply airflow rate to the room, Q in CFM 5. Determine the rate at which heat must be added in Btu/hr to a 6000 cfm airstream passing through a

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.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody