SW StudyWalks

Chemistry  /  Chem 0636  ·  Atom · ~20 seconds

System and Surroundings

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The system is the matter undergoing a studied change; the surroundings are everything else able to exchange heat with it.

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In a calorimetry experiment, the reacting substances are the system, while the surrounding solution and calorimeter body count as the surroundings.

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The system/surroundings boundary is a choice the observer draws for the analysis, not a physical wall built into the apparatus.