where CGS units (cm, s, gmol. kcal, K) are employed. A. Identity the order of th
ID: 955733 • Letter: W
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where CGS units (cm, s, gmol. kcal, K) are employed. A. Identity the order of the reaction with respect to propane. B, Identity the order of the reaction with respect to o,. c What is the overall order of the global reaction? D, ldentify the activation energy for the reaction. 4.6 In a global, single-step mechanism for butane combustion, the reac tion order with respect to butane is 0.15 and with respect to oxygen is l 6. The rate coefficient can be expressed in Arrhenius form: the pre- exponential factor is 4,16 109 [(kmol/m3) 0.75/s] and the activation en- destruction, dlC4H10l/dt. 4.7 Using the results of problem 4.6, determine the volumetric mass oxidation rate of butane, in kg/s-m', for a fuel-air mixture with an equivalence ratio of 0.9, temperature of 1200 K, and pressure of 1 atm. 4.8 Classify the following reactions as being either global or elementary. For those identified as elementary, further classify them as unimolecular. bimolecular, or termolecular. Give reasons for your classification. A. Co OH CO, H B. 2CO+ O, 2CO2. D. HOCO H+CO2. E. CH 202 CO2 +2H20. 4.9 The following hard-sphere collision diameters, a, are taken from Svehla [17]: Molecule OH H2OExplanation / Answer
The rate of destruction of butnae, d[C4H10]/dt = K [butane] 0.15 [O2] 1.6
K= Rate constant = Ko e(-Ea/RT) = 4.16*109*[ kmol/m3) -0.75 e- (125000/RT)
ko= Pre exponential factor
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