Problem: Consider a 1.0-L sample of helium gas and a 1.0-L sample of argon gas, both at room temperature and atmospheric pressure.  Do the argon atoms, since they are more massive, exert a greater pressure on the walls of the container? Explain. 

FREE Expert Solution

Pgas=XgasPtot


At constant T, P → n is proportional to V, VHe = VAr so:

  • mole fraction:
  • XHe=XAr=ngasntot=VgasVtot=12=0.5
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Problem Details

Consider a 1.0-L sample of helium gas and a 1.0-L sample of argon gas, both at room temperature and atmospheric pressure.  Do the argon atoms, since they are more massive, exert a greater pressure on the walls of the container? Explain. 

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What scientific concept do you need to know in order to solve this problem?

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