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Why does the volume of air in the spirometer drop slowly over the first minute?
Wiki User
∙ 10y ago
The person breathes in oxygen and breaths out carbondioxide back into the spirometre. Because the carbondioxide can become a saftey hazard, soda lime is placed in the spirometre to remove the carbondioxide, however the volume of carbondioxide is equal to the volume of oxygen, as the oxygen is not being replace, so removing the carbondioxide removes the oxygen as well, making the spirometre drop.
Wiki User
∙ 10y ago
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