3. In a global, single step mechanism for butane combustion, the reaction order with respect to butane is 0.15 and with respect to oxygen is 1.6. The rate coefficient can be expressed in Arrhenius form: the pre-exponential factor is 4.16x109 [(kmol/m3)-0.75/s) and the activation energy is 125,000 kJ/kmol. Write out an expression for the rate of butane destruction, d[C4H10]/dt. Determine the volumetric mass oxidation rate of butane, in kg/s-m3, for a fuel-air mixture with an equivalence ratio of 0.8, temperature of 1500 K, a pressure of 1 atm. The Arrhenius form is k