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Under the IUPAC convention, q is positive when what happens?
AHeat flows from surroundings to system
BHeat flows from system to surroundings
CThe system does work on surroundings
DThe system has an adiabatic wall
Answer & Solution
Correct answer: A. Heat flows from surroundings to system
Heat entering the system raises its internal energy, so q is counted positive in that case.
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