Gchem gases question

[discowisco]

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For a closed system in a 1.00 l sealed piston what is observed when the temperature of the system increases?

Answer was the mean free path increases.

Can anyone explain why?

 

[ashtonjam]

It may be because pistons can move up and down to keep the system at a constant pressure (isobaric conditions). If you heat up the system that is initially at 1 liter, the gas molecules move around a lot and exert more pressure on the walls. This moves the piston up until pressure equalizes with the exterior again. The new volume is greater than 1 liter. Since volume is correlated with mean free path, an increase in volume means an increase in mean free path.

 

[discowisco]

Yeah but it said closed system?

 

[Nissan GTR]

Yeah but it said closed system?

closed system means nothing else is entering or leaving. it doesnt mean the container cannot expand or close. the piston will move up and volume should increase, so mean free path of the gasses increases