What is the difference between system and surroundings?
The system is the reaction you study; the surroundings are everything else that can exchange heat/work with it.
The system is the reaction you study; the surroundings are everything else that can exchange heat/work with it. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
system vs surroundings
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