For a stoichiometric adiabatic laminar premixed propane flame with single-
step global kinetics propagating through a gaseous mixture of fuel, oxygen,
and nitrogen, how does the reaction rate R vary with the ratio X1
N2
=X1
O2 where
X1
N2 is the ambient nitrogen concentration and X1
O2 is the ambient oxygen
concentration? In other words, indicate the proportionality R / fð Þ c where
c ¼ X1
N2
=X1
O2
. Does the reaction rate increase or decrease with increasing c and
why?