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Question: in class we discussed stoichiometric ideal combustion of hydrocarbons in...

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In class we discussed stoichiometric (ideal) combustion of hydrocarbons in ideal dry air, and introduced the equivalence ratio φ Consider the combustion of hydrocarbon CxHy, where x and y are known for a given hydrocarbon (eg, for methane, CH4, x = 1, y = 4). The general equation for non-ideal combustion of hydrocarbon Hy is where molar coefficients a, b, c, d, e, and fneed to be calculated to balance the equation, and trace means small quantities of other pollutants, such as alcohols, NOx, aldehydes, etc (a) Generate algebraic expressions for coefficients a, b, c, d, e, and fas functions of each other and of (known) x and y as far as possible. In particular, provide equations for b, c, d, and fas functions of x, y, a, and e. Hint: You will not be able to solve explicitly for all the coefficients, since there are 6 unknowns and only 4 elements in the equation with which to generate expressions (C, H, O, and N) (b) Consider the stoichiometric case in which there is no excess air. a-astoih, and there is no CO or excess air on the RHS (c) Gasoline is mostly octane, C8His. For octane, calculate the molar coefficients and write the final chemical equation for (d) Now consider combustion of octane with Φ= 0.833333 Also, molar coefficient e is known to be 2 in this particular (e) Calculate the mol fraction of CO (in PPM) of the exhaust gas products of the case of Part (d) (e-f-0). Generate expressions for coefficients a (a- astoich), b, c, and d as functions of only x and y. the stoichiometric case case. Calculate the molar coefficients and write the final chemical equation for this case. Is this rich or lean combustion?

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