OK...First of all, Alistair needs to get another hobby....maybe it's pork
season??  Anyway, I would not use my figure bcuz I did not get to the van
that night until 5:30am for a 4 hour nap.  We also spent alot of time(6
people) just chilling in the van and talking so had the heater running then,
also.  I guess I need to do another experiment.
BTW-Got my Heater Buddy last year for 40.00 at Lowe's due to a listmember
posting a one-day special.
Michael in San Antonio
91GL Weekender AT 2.1L 'Gringo'

On Mon, Nov 8, 2010 at 3:39 PM, Alistair Bell <albell@shaw.ca> wrote:

> aha! its an opportunity, not to answer question, but to work out just
> how much water vapour is produced by burning the 1 lb bottle of propane.
>
> lets make assumption that no CO is produced, ie the heater is working
> perfectly, and that there are 16 oz to the lb, or 454 g.
>
> combustion equation:
>
> C3H8 + 5O2 ----->  3 CO2  + 4H2O
>
> so we see for every mole of propane burned, we get 4 moles of water.
>
> molecular weight of propane = 44 g/mol
>
> moles per 1 lb bottle = 454/44 = 10.3 moles
>
> therefore burning the entire bottle would produce 4(10.3) = 41.2
> moles of water
>
> molecular weight of water = 18 g/mole
>
> therefore 18(41.2) = 741.6 g of water produced.
>
> almost 3 cups of water into the van in 6 hrs.
>
>
> alistair
>
>
>
>
>
> On 8-Nov-10, at 12:16 PM, Courtney Hook wrote:
>
> Just hauled out my little Buddy Heater and it claims 6hrs on low with
> a 1 LB cylinder. Has anyone actually ever timed one to see how
> realistic that is? I'm doing it right now, but with a re-filled 1 LB
> cylinder which never seems to refill completely. I'll see what I get.
> Courtney
>
> ++++++++++++++++++++++++++++++++++++++++++++++++++
> Always be yourself, because the people that matter don't mind,
> and the ones who mind, don't matter.
>