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Usually vials are open systems because matter and energy can enter them due to lack of a lid. If there IS a lid however, it would be a closed system (unless that vial was in some sort of light blocking vacuum chamber).
A 20mL vial with an organic solvent is an open system. An open system can exchange both energy and matter with the surroundings. Solvent (matter) can be taken out of the vial, the key word is that the vial is "open." The solvent can be heated up or cooled down, in which energy is exchange as heat with the surroundings.
Rachel N 1I wrote:Why is the contents of an ideal cooler at 3 deg Celsius considered isolated and not closed?
In an ideal cooler, no energy is exchanged with the surroundings (because ideally its contents will stay cold without absorbing warmth from the outside), so it's isolated.
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