A 0.410 mol n-butane/mol, 0.590 mol propane/mol mixture at 25°C enters a furnace. In a separate stream, air enters the furnace in 10.0% excess at 171.0°C. The fuel reacts completely. Calculate the adiabatic flame temperature by following the steps below. Take 100 mol of fuel as the basis. Assume the heat capacity for O2 is 3.31 à 10-2 kJ/(mol·°C), N2 is 3.13 à 10-2 kJ/(mol·°C), H2O is 3.85 à 10-2 kJ/(mol·°C), and CO2 is 5.00 à 10-2 kJ/(mol·°C).

What is N2, the moles of air entering the furnace?

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?

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.