You buy an \"airtight\" bag of potato chips packaged at sea level, and take the

Question

You buy an "airtight" bag of potato chips packaged at sea level, and take the chips on an airplane flight. When you take the potato chips out of your "carry-on" bag, you notice it has noticeably "puffed up."

Airplane cabins are typically pressurized at 0.76 atm, and assuming the temperature inside an airplane is about the same as inside a potato chip processing plant, by what percentage has the bag "puffed up" in comparison to when it was packaged? Express your answer using two significant figures.

Explanation / Answer

percent of change in volume of the chip packet is

dV / V1 = ( Patm - P1 ) / P1

   = ( 1 - 0.76) / 0.76

= 0.315

Therefore bag is 31.5 % puffed up.

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