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?

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Q: please help me

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Q: During a normal breath, our lungs expand about 0.50 L against an external pressure of 1.0 atm. How…

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A: Work done is given by W=-Pext(V2-V1) Pext is the external pressure and V2 is the final volume and V1…