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The emission of an air pollutant is often influenced more by reaction kinetics than by chemical equilibrium. Verify whether this is true for a hypothetical case of hydrocarbon (methane) combustion. The pseudo-first-order rates of the relevant parallel reactions can be represented as follows: CH4 + 1.5O2 = CO + 2H2O k1 (s-1) = 0.5x108 exp(-20000/T) CH4 + 2O2 = CO2 + 2H2O k2 (s-1) = 1.0x106 exp(-15000/T) Compare the equilibrium composition with the composition achieved after burning 50 mol/L of CH4 for 1 s at 950 K and 1 atm air. And for 20 s? Hints: (a) Solve three equations in three unknowns, [CH4], [CO], [CO2], to determine the kinetics-governed composition. (b) Remember that conductances (rate constants) are additive for simultaneous processes (reactions).
a prove using the increse in entropy principle that the maximum thermal efficiency for any heat engine is the carnot
an ideal rankine cycle produces 100 MW of power. If the steam enters the turbine at 100 bar and 500C and is condensed at 1 bar, determine the flow rate of stream and the thermal efficiency.
the bar in the picture is subjected to a distributed force fx and tensile forces at the both ends. derive the governing
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you are a new engineer at a company that manufactures gas-filled shock absorbers for racing cars. the chief engineer
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Determine the required length L of each splice if a factor of safety is 2.75.
Determine the number of storage bits required in the controller memory so that the accuracy of the joint is as close as possible to, but less than, its repeatability. Use six standard deviations as the measure of repeatability.
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ten grams of liquid water at 95 c are contained in the insulated container shown. the pin holding the frictionless
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