For a propane$/$air adiabatic laminar premixed flame with single$-$step global kinetics, calculate the laminar flame speed SL and flame thickness d for an equivalence ratio $\backslash$phi $=0\mathrm{.}7.$ Assume a pressure of $1$ atm, an unburned gas temperature of $300$ K$,$ a mean molecular weight of $29$ g$/$mol$,$ an average specific heat of $1\mathrm{.}2$ kJ$/$kg$-$K$,$ an average thermal conductivity of $0\mathrm{.}09$ W$/$m$-$K$,$ and a heat of combustion of $46$ MJ$/$kg$.$ The kinetics parameters you will need for propane $($C$3$H$8)$ are a $=0\mathrm{.}1,$ b $=1\mathrm{.}65,$ Tig $=743$ K$,$

E $=125\mathrm{.}6$ kJ$/$mol$,$ and A $=8\mathrm{.}6$ x $1011$ cm$2\mathrm{.}25/($s$-$mole$0\mathrm{.}75).$ When calculating the reaction rate, be sure to evaluate the molar concentrations in units of moles$/$cm$3.$