C-Pap power usage

MrWizard wrote:
please point me to some reference that says one gallon of propane produces 3 quarts of water

if all much hydrogen is used from the LP (hydrocarbon chain) to combine with oxygen in the air to produce water,
what is producing the heat, and where did the carbon atoms go

heat comes from breaking down the propane into free hydrogen and free carbon and the hydrogen combining with oxygen which equals water plus heat and carbon combining with oxygen producing CO2 plus heat.

The breakdown begins when the propane comes in contact with a heat source hot enough to start the reaction.

The equation for the combustion of propane is:
C3H8 + 5 O2 = 3 CO2 + 4 H2O + energy
for Complete Combustion...

However, you do not get complete combustion, you get some CO
2 C3H8 + 7 O2 = 2CO + 8 H2O + 2CO2 + energy

In either case burning 2 moles of propane will produce 8 moles of water.

1 mole of propane is 44 grams and 1 mole of water is 18 grams.

44 grams = 0.0970024 pounds
18 grams = 0.0396828 Pounds X 4 = 0.158731 pounds

0.09070024 / 0.1587312 = 1/x

x= 1.75 pounds of water for each pound of propane

For water, 1 gallon = 8.33#

For liquid propane, it varies according to temperature. At 77 degF, it is 1 gallon per 4.11#

so buring 4.11 lbs of propane equal 7.19 lbs of water or .86 gallons of water, more than 3 quarts of water.

thats why you see so much water vapor in cold air from burning hydrocarbon fuels, it's all the water as a byproduct of combustion condensing as it cools below the dew point.

plust lots of heat, about 90,000 BTU per gallon of liquid propane burned.

you can do the same calculation for burning natural gas, diesel, gasoline, oil etc. you get heat, water and C02.

when buring coal, which is almost completely carbon, virtually no hydrogen you get heat plus C02, and very very little water.

you can do the same set of calculations to determine how many lbs of C02 are produced.