Liquid octane (c8h18) at 25oc, 1 atm and a mass flow rate of 0.57 kg/h enters an internal combustion engine operating at steady state. the fuel burns with air entering the engine in a separate stream at 25oc, 1atm. combustion products exit at 670 k, 1atm with a dry molar analysis of 11.4% co2, 2.9% co, 1.6% o2, and 84.1% n2. the engine develops power at the rate of 3 kw. determine

(a) the balanced reaction equation;
(b) the rate of heat transfer from the engine, in kw.

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.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.