Date:         Wed, 16 Jan 2008 11:28:23 -0500
Reply-To:     Greg Potts <greg@POTTSFAMILY.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Greg Potts <greg@POTTSFAMILY.CA>
Subject:      Re: Water content of propane exhaust (as Re: ...its alright ...if
              you wanna get down .... propane ... (apologies to eric c.))
Comments: To: Alistair Bell <albell@shaw.ca>
In-Reply-To:  <A6A9D1D9-8075-47BC-93D5-A15DE43B5DF4@shaw.ca>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Hi Alistair,

My bad... I adapted a calculation starting with 96g of propane, not
454g as I stated in my post. I guess that's what happens sometimes
when you do math at 3AM.

It's been quite a while (a couple decades) since I did highschool
chemistry. Thanks for straightening that out.


Happy Trails,

Greg Potts
1973/74/77/79 Westfakia "Bob The Tomato
www.pottsfamily.ca
www.busesofthecorn.com



On 16-Jan-08, at 11:04 AM, Alistair Bell wrote:

> are you sure?
>
> one pound propane = 10.3 moles (mw propane approx 44g)
>
> one mole propane produces 4 moles H2O, which weighs 76 g (76 ml)
>
> 1 pound propane = 10.3 moles propane = 760 ml H2O.
>
> see?
>
> alistair
>
>
>
> On 16-Jan-08, at 2:52 AM, Greg Potts wrote:
>
> Hi Roger,
>
> I did the chemistry on that last year, as I was interested in just
> how much water was produced.
>
> C3H8 + (5)O2 --> (3)CO2 + (4)H2O
>
> According to my calculations, a 1lb bottle of propane produces 76 ml
> of water (less than three ounces), with the remaining byproducts
> emitted as CO2 gas. See this page for details:
> http://www.sparknotes.com/testprep/books/sat2/chemistry/
> chapter7section3.rhtml
>
> A human being exhales 2-4 cups of water per day, depending on the
> relative humidity. Divide that by 3 (8 hrs sleeping in the westy) and
> you still get a LOT more water from a human than you do from a
> propane heater.
>
> Happy Trails,
>
> Greg Potts
> 1973/74/77/79 Westfakia "Bob The Tomato
> www.pottsfamily.ca
> www.busesofthecorn.com
>
> On 16-Jan-08, at 1:29 AM, Roger Whittaker wrote:
>
>> if you have a propane heater that you wish to use during the night
>> remember that propane heaters produce lots of water as a byproduct of
>> combustion
>> this will make the underneath of foam cushions where you sleep
>> damp ...
>> also make sure you have enough ventilation ...
>