Question #299723

Suppose that you are travelling in the Space Shuttle Endeavor on a journey to Mars. The atmosphere (of the vehicle) consists of 20% oxygen and 80% helium by volume. It was noticed before take off from the Kennedy Space Center that there is a small leakage which if unchecked, would lead to a continual loss of gas at a rate of 0.05 atm/day through effusion. If the temperature in the space shuttle is maintained at 22°C and the volume of the vehicle is 15,000 liters. Calculate the amounts of helium and oxygen in grams that must be stored on a 5-day journey to allow for the leakage.

1
Expert's answer
2022-02-20T08:39:35-0500

Change in pressure

0.05×5=0.25atm0.05 ×5=0.25atm


PV=nRTPV = nRT


0.25×15000=n×0.08205×(22+273.15)0.25 × 15000= n ×0.08205×(22+273.15)

n=154.8495molesn=154.8495\>moles


Mass of Oxygen


=20100×154.8495×32=991g=\frac{20}{100}×154.8495×32=991\>g


Mass of Helium


80100×154.8495×4=495.5g\frac{80}{100}×154.8495×4=495.5g




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