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Vertebrate and Number of Breaths - Ideal Gases

  • Thread starter dvolpe
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  • #1
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Homework Statement



The volume of air taken in by warmblooeded vertebrate is 250 L/day at standard temperatutre and pressure (0 Degrees C and 1 atm). If air in lungs is at 43 degrees C under pressure of 440 mm HG and we assume vertebrate takes in average volume of 100cm cubed per breath at the termperature and pressure of the lungs, how many breaths does this vertebrate take per day?

Homework Equations


PV = nRT
P1V1=P2V2


The Attempt at a Solution

Calculate V2 using P2V1=P2V2 and then divide V2 by 100 cm cubed. But then why did they give me the temp and pressure inside of the lungs?
 

Answers and Replies

  • #2
The amount of air needed is given at STP - but the volume of the lungs are at a different T,P so you need to work out either how much air is needed at lung T,P or the lung volume at STP
 

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