Hi!
This is my first time posting here (5 newsgroups).
I sure would appreciate some advice on a couple of things.

First, what volumetric ratio is the optimal mixture for combustion of butane
with air at STP?
What temperature is required to initiate the combustion reaction?
At what rate would a combustion front propagate through this mixture?
If volume is held constant before and after combustion, by what amount will
the temperature of the mixture have increased after the reaction?
Finally, if the mixture is made leaner, will the temperature increase be
reduced roughly proportionally to the amount of fuel present?

Thanks.
Phil.