Lose weight by breathe
A doctor or assistant can measure with a spirometer,
the lungs absorb an average of 0·3 liters of oxygen
every minute if the patient is at rest.
This oxygen is used to burn the fuel in the blood, glucose.
A number of intermediate steps happen and excipients are used.
The end result is that carbon dioxide and water vapor are exhaled.
1·0 mole of gas or vapour has a volume of about 22 liter depending on temperature.
Then 0·3 liter oxygen is an amount of (0·3 / 22) mole = 14 mmole.
The net chemical reaction is C6H12O6 + 6O2 → 6CO2 + 6H2O.
For each mole:
180 gram glucose + 192 gram oxygen → 264 gram carbon dioxide + 108 gram water vapor.
It is about 372 grams both before and after the reaction.
So the conservation law of mass is satisfied.
A ratio table or proportion table:
| duration | volume
oxygen | amount of
oxygen | mass of
oxygen | amount of
glucose | mass of
glucose |
| 7·4 hours | 134 | 6 | 192 | 1 | 180 |
| 1·0 minute | 0·3 | 0·013 | 0·43 | 0·0022 | 0·4 |
| 24 hours | 432 | 19 | 619 | 3·2 | 580 |
| liter | mole | gram | mole | gram |
Conclusion
Solely and exclusively by breathing at rest, everyone loses 580 grams of glucose.
So everybode loses 0·6 kg of weight by not eating.