AP Chemistryeasymcq1 pt
Which sign convention is correct?
A.Heat absorbed by a system is positive
B.Heat released by a system is positive
C.All ΔH values are negative
D.Sign conventions are arbitrary per problem
Explanation
Core Concept
By convention, the system gains energy with a positive sign. An endothermic reaction therefore has q > 0 and ΔH > 0.
Correct Answer
AHeat absorbed by a system is positive
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