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Problem 1 Purpose: help you to understand the equation ΔU=q+w Necessary reading: Lecture note slide 11 and/or textbook p422 When heat is absorbed by the system and work is done by the surroundings on the system then A. q is negative and w is positive. B. both q and w are positive. C. both q and w are negative. D. q is positive and w is negative.

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