Which statement correctly describes a closed system in thermodynamics?

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Multiple Choice

Which statement correctly describes a closed system in thermodynamics?

Explanation:
In thermodynamics, a closed system can exchange energy with its surroundings but not matter. Energy can cross the boundary as heat or work, altering the system’s energy, while the amount of substance inside remains constant. If mass could cross the boundary, it would be an open system; if neither energy nor mass crosses, it would be isolated. So, the description that exchanges energy but not mass best captures a closed system.

In thermodynamics, a closed system can exchange energy with its surroundings but not matter. Energy can cross the boundary as heat or work, altering the system’s energy, while the amount of substance inside remains constant. If mass could cross the boundary, it would be an open system; if neither energy nor mass crosses, it would be isolated. So, the description that exchanges energy but not mass best captures a closed system.

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