The system which exchange only energy with its surroundings is called______________?
Correct answer: B. closed system
- A. Open system
- B. closed system
- C. Isolated system
- D. All of the above
Explanation
A closed system can exchange energy, such as heat or work, with its surroundings but does not exchange matter. An open system exchanges both matter and energy, while an isolated system exchanges neither. Option c is the common mistake because students may focus on the word system and forget that an isolated system permits no energy transfer.
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About System, Surroundings and State Functions
A system is the part of the universe under study, while everything outside it is the surroundings; the boundary separates them. State functions such as pressure, temperature, volume, internal energy and enthalpy depend only on the state, unlike heat and work, which depend on the path taken.
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