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 w

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?