On Fri, 30 Oct 2009 03:12:20 -0700 (PDT), RobertL wrote:

Interesting, I hadn't thought of it like that. In fact, it makes more
than 1kg of water:

C3H8 + 5 O2 = 3 CO2 + 4 H2O

Except most portable gas fires burn butane. B-)

2C4H10 + 13 O2 - 8 CO2 + 10 H2O

So produce 1.55kg water/kg butane.

--
Cheers
Dave.