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Neil ya dummy.We breathe out right? We RESPIREWhat's the formula matey?Oxygen + Glucose --> Carbon Dioxide + Water + (Energy)We will always give off Carbon Dioxide in the respiration process. So we cannot clearly say, when all the gases in our house are completely replaced by oxygen, because unless you make a vacuum within the house, it would probably still be impossible, as Nitrogen and Carbon Dioxide from outside will come into our houses aswell as the Oxygen. There is about 70% of Nitrogen in the air!
Yes.. But through the little holes and cracks and everything. Nitrogen and Carbon Dioxide will seep through?
Yes.. But aren't there thousands of factors for that, so we cannot actually measure it?1. All houses are different sized2. Some are more or less seeled than others3. Wind helps with air seeping through. Depends where you live.Right?
IRC § 303.1: Light, Ventilation, and Heating/Habitable Rooms. Habitable rooms must be provided with total glazing (window) area of at least eight percent of the room’s floor area. Natural ventilation must be provided through readily controllable windows, doors, etc. Minimum openable area to the outdoors must be four percent of the room’s floor area. Windows need not be openable if they are not needed for emergency exit and a mechanical ventilation system is capable of producing 0.35 air change per hour in the room, or a whole-house ventilation system is installed capable of supplying outdoor air at 15 ft³ per minute per occupant, with occupants computed based on the number of bedrooms.
Hmm.. Neil. But does smoke diffuse at the same time as Carbon Dioxide or Oxygen?
Hi Neil, HI BC,Do you mean that, if you could label all the molecules of the air in your house (I think painting them purple would be a good way to do it) and then you left the house, how long would it be before there were no purple molecules left? YES !!If so I think the answer is never. Oh really, how come ?..If you emptied out the air- say you opened the windows on a windy day- and then mixed all the purple air with the rest of the atmosphere and refilled your house there would always be some of the purple molecules in your house. Aha..I see !!The atmosphere weighs something like 14.7 pounds per square inch. Cripes..that's a lot !! That's about 50 tons to the square metre. That sounds even more !! It covers something like 150,000,000 square km so, in total it weighs about 7.5x10^18 Kg (Google seems to give an answer rather less than that, but it hardly matters).A cubic metre of air weighs about 1.2Kg so my house (I don't know how big your house is) holds about 300Kg of air. So the atmosphere is about 2x10^16 houses full. If you painted a houefull of air purple and mixed it up with the rest of the air about in molecule in 2X10^16 would be purpleHowever a house contains something like 6x10^27 molecules, so if one in 2x10^16 is purple, then a housefull would contain something like 3x10^11 purple molecules.Of course, you can't really label the molecules, but the maths is the same anyway. Wow !!..nice calculations !!By the way the diffusion rates for gases (all other things being equal) vary as the reciprocal of the square root of the molecular weight; it's called Graham's law. Good old Graham !
You can't beat a post full of purple air molecules.