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The average human lung expands by about 0.50 L during each breath. If this expansion occurs against an external pressure of 1.0 atm, how much work (in J) is done during the expansion?
$-5 / J$
Chemistry 102
Chemistry 101
Chapter 9
Thermochemistry
Thermodynamics
Chemical reactions and Stoichiometry
Carleton College
University of Central Florida
University of Kentucky
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So in this problem were told that the human long expands to zero point five zero leaders when inhaling and if done with an external pressure of one point zero atmospheres, what is the work done during this expansion? And so we use our equation for work, which is negative pressure times the change in volume. So we have our negative or pressure of one point zero atmospheres and this is P external. It's the pressure, thie, external pressure, which is how this one point zero atmospheres is defined and then multiply that by our Delta V. So our final volume is the zero point five zero leaders and our initial volume is just going to be zero leaders. This must be assumed from the problem and so that gives us a work done of zero point five zero leader atmospheres. However, we want the answer in jewels. So we'Ll just multiply that by a conversion factor one a one point three to five Jules per leader atmosphere And so our leader atmospheres cancel and we get her answer and jewels, which is negative fifty one Jules. And that is our final answer for the work Done
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