Ok you chemisists out there. Got any ideas??? :)

I did a quick search and found this...

I suggest you go to Hazard.com's MSDS database and search for "gasoline." A typical mid-grade gasoline from US Oil and Refining Co has a flash point of -43°C; all gasolines and similar hydrocarbon liquids will have flash points below the freezing point of water. This means that at ANY reasonable ambient temperature, there are dangerous quantities of fumes above any substantial amount of the gasoline.

The boiling point is a bit problematic; the gasoline I cite above lists 9 or 10 ingredients, some of which are themselves mixtures, and many of which have rather different boiling points. And different gasolines--even from the same company!--will have different ingredients, fine-tuned to meet the octane rating and the local air quality standards.

I did a quick search and found this...

I suggest you go to Hazard.com's MSDS database and search for "gasoline." A typical mid-grade gasoline from US Oil and Refining Co has a flash point of -43°C; all gasolines and similar hydrocarbon liquids will have flash points below the freezing point of water. This means that at ANY reasonable ambient temperature, there are dangerous quantities of fumes above any substantial amount of the gasoline.

The boiling point is a bit problematic; the gasoline I cite above lists 9 or 10 ingredients, some of which are themselves mixtures, and many of which have rather different boiling points. And different gasolines--even from the same company!--will have different ingredients, fine-tuned to meet the octane rating and the local air quality standards.

Thanks, but I already did see that. Doesn't help us though, does it? :rofl:

Are you trying to figure out the temp at which you start to get vapor lock?

I think you'll want to investigate the vapor pressure of a volatile liquid...that will give you a temp and altitude at which a liquid will go into a gaseous state.

I only know the vapor pressures for halothane, isoflurane, methoxyflurane, desflurane, and sevoflurane. Sorry.

My favorite state change is sublimation. The best way to describe sublimation is to use a fart as an example: solid -> gas with no latent liquid state. I think we have all experienced this.

Oh well, enough geekery.

-Jimmy "Pro Gas Passer" Tom

Welcome to the thread Pro Gas Passer!

Actually, a guy with a Mustang has actually heard his fuel boiling. Yes, he is suffering from Vapor lock, but they do believe the gas is getting hot enough to boil.

Gasoline boils at 100-400* It's all different.

its dependent on the RVP of the fuel... the fuel refineries change the RVP from season to season and by area. e.g. in Arizona the RVP is lower than in Alaska
-dave

As dicussed above there is a RANGE of boiling points for usual gasoline, and as mentioned above it is formulated for the local climate, varying amounts of iso-butane are used to raise octane, but the vapour pressure problems limit the amount that can be used.
Try the "gasoline FAQ" at faqs.org...

mike