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1. Octane (C8H18) enters an engine and burns with air to give products with the dry molar analysis of CO2, 10.5%; CO, 5.8%; CH4, 0.9%; H2, 2.6%; O2, 0.3%; N2, 79.9%. Determine the equivalence ratio.
2. Methane (CH4) burns with air to form products consisting of CO2, CO, H2O, and N2 only. If the equivalence ratio is 1.25, determine the balanced reaction equation.
3. Liquid octane (C8H18) at 778F, 1 atm enters a combustion chamber operating at steady state and burns completely with 50% excess dry air entering at 1208F, 1 atm. The products exit at 10608F, 1 atm. Determine the rate of heat transfer between the combustion chamber and its surroundings, in Btu per lbmol of fuel entering. Kinetic and potential energy effects are negligible.
A high strength steel [E = 200 GPa] tube having an outside diameter of 80 mm and a wall thickness of 3 mm is bent into a circular curve having a 52 m radius of curvature. Determine the maximum bending stress developed in the tube
The assembly shop of a manufacturer of large air conditioners for commercial and industrial buildings has numerous units at various stages of completion, most sitting unattended for lack of parts. As parts and subassemblies arrive from other departme..
In a car engine gasoline (assume octane C8H18) is evaporated and then mixed with air in a ratio of 1:15 by mass. In the cylinder the mixture is at 750 kPa, 650 K when the spark fires. For that time find the partial pressure of the octane and the spec..
a wall has inner and outer surface temperatures of 16c and 6c respectively. the interior and exterior air temperatures
The electricity cost is critical for the final price of the aluminium. What cost per kWh of electricity is acceptable if the company wishes to restrict the electricity cost to £300 per tonne or less?
Estimate the greatest value of the elastic modulus that can be obtained by long randomly oriented ?bers of E-glass embedded in an epoxy resin if the volume fraction is 40%. Assume that the modulus of the epoxy is 5 GPa.
Briefly discuss the operation and application of venturi meter, pitot tubes, electromagnetic and acoustic meters in fluid measurements
air enters a compressor operating at steady state at 17oc 1 bar and exits at a pressure of 5 bars. if there are no
Air is compressed at steady state from 1 bar, 300 K to 5 bar 500 K using 150 kW of power. The compressor produces 50 kW of heat that is transferred to the surroundings. Assuming an ideal gas determine the mass flow rate of the fluid.
it takes 0.5 seconds for one to lift the cart handle from 0 to 450 in a linear way around o. if the block has a mass of
Water flows at a rate of 20 l/s through a horz pipe dia .03 m. The pressure drop across the valve in the pipe is measured to be 2 kPa. Determine the irreversible head loss of the valve, and the useful pumping power needed to overcome the resulting..
if the atmospheric pressure is 1.025 bar at a location where you can dive in lake to 30 ft below the surface and then
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