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04-06-2016
Chemistry

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When studying the movement of heat,what does the term "system" refer to? What does "surroundings" refer to?

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04-06-2016

When studying the movement of heat, what does the term "system" refer to any quantity of matter of fixed identity of the chosen study. “Surroundings" refer to the rest of the universe beyond the boundary of your chosen study or system.

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20x-3y = 4 and 3x -y = -5