MCAT Question- Spoiler from C/P QPack

[treeclimbingmonkey]

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Could someone please explain this to me please? I got it right, because it is the only answer that makes sense, but I don't completely understand the reasoning behind it.

 

[lumya]

The ideal gas law assumes that there's no intermolecular forces and that the the actual volumes of the molecules do not affect the gas (think about how a molecule of a gas does take up some space and how gas molecules might interact but are far enough to not have a significant effect). At 180 giga pascals you are increasing the pressure enough where it compresses the gas together where molecular volume and intermolecular forces does become a factor.

 

[treeclimbingmonkey]

The ideal gas law assumes that there's no intermolecular forces and that the the actual volumes of the molecules do not affect the gas (think about how a molecule of a gas does take up some space and how gas molecules might interact but are far enough to not have a significant effect). At 180 giga pascals you are increasing the pressure enough where it compresses the gas together where molecular volume and intermolecular forces does become a factor.

Thank you!