It doesn't create water, the water is already in the air it takes in for
combustion in the form of humidity. That humidity just condenses in the exhaust
as it cools. Live in a very humid area, you get a fair amount of water out the
exhaust, live in a dry climate you get less.
Certainly some of the water in the exhaust comes from the water vapor in the
air. However, more is created when you burn gasoline. After all, this is how
you get the energy out. You are convreting a hydrocarbon (hydrogen + carbon)
fuel into water (H20), Carbondioxide (CO2), some other stuff (CO, NOX, etc)
and energy. The amount of water created by combining ozygen and hydrogen in
most cases is greater than the vapor included with the intake charge.
Try looking at http://www.newton.dep.anl.gov/askasci/chem99/chem99583.htm .
I'll net it out. For each gallon of gasoline you burn, you'll create
somewhere around 1 gallon of water.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.