How Many Liters Of Carbon Dioxide Does A Person Breath Out Each Day?

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Anonymous Profile
Anonymous answered
Wow, that Kanza really is an amazing combination of ignorance & arrogance! Of course you don't create dry ice in your lungs! The gases in your lungs are at the same pressure as the surrounding atmosphere - they have to be because the space in your lungs is directly connected (via your nose & mouth) to the outside world - that's how the gases get in and out as your ribs/diaphragm expand & compress your lungs.
Anonymous Profile
Anonymous answered
An average human breathes some 10 times per minute, 600 times per hour, or 14,400 times per day. If we assume that each breath contains one liter of air, then simply human inhales some 14,400 liters of per day. Air is composed of about 16% oxygen, of which about half is exchanged for carbon dioxide during each breath. Then this means an average exhalation of some 14,400 x 8% = 1150 liters of carbon dioxide per person per day.
thanked the writer.
Anonymous
Anonymous commented
The person who told you 14,400 liters a day is an idiot and here is why: A substance in a solid state have a fixed volume and shape. Liquids have A fixed volume and shapes to fill its container. A gas has NO FIXED VOLUME OR SHAPE. Gases expand and shape to fill their container. CO2 that you breathe is in a gas state, (unless you breathe liquid CO2, which in that case I'd like to meet the person who can breathe in O2 and produce dry ice in his/her body) so its volume depends on what its in. If you breathe out what was a liter of CO2 in your lungs it will expand as soon as it leaves. Your lungs are compressed, so the pressure will be different from outside your body. Therefore, the only way to determine this is to have someone figure out many different variables and conduct an experiment using these like constant temperature, pressure, etc. Also, even if the numbers used were applicable, they would still be wrong. Carbon has a different mass, volume, etc. than oxygen. Just letting you know so you don't listen to that answer.
Anonymous
Anonymous commented
Two big problems with the answer:
1) An average breath is about 500ML, or HALF of what was stated.
2) The average breath breathed out is about 4-5% CO2 by volume, not 8% (amount breathed *in* is negligible, so 4% increase in CO2 is reasonable).

So that leads to 4% of 500ML, or 20ML per breath. Multiply by 14,400 and you get about 288 liters. Because all these estimates are so rough, I'd round to 300 liters and say the tens digit is doubtful.

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