Closed system

[Norman Dis4C]

Can someone explain why the volume of a closed system can change? Any examples would help!

[Vinita Saxena 2I]

The volume of a closed system can change if there is a piston, especially when gases are involved.

[Frank He 4G]

A closed system means that matter cannot go in or out, but heat can. If the system is contained within something that can expand or contract, then the volume can change. An example we often use is a piston. A different example could be a balloon, though we can not as easily control the pressure of a balloon from the outside.

[Dan M -3E]

Basically what they said above, the volume of a closed system can change when its container expands or contracts, but the amount of mass will not change.

[Brian J Cheng 1I]

The defining characteristic of closed system is that there is no matter exchange between the system or its surroundings. Almost anything else is applicable (i.e. heat transfer, volume changes, etc). Traditionally volume changes are incurred via the depression/compression of a piston as many have said above.

[Timmy Nguyen Dis 1I]

It can change because something might be pushing against it but the pressure of the gas could push back.