8. Thermochemistry
Hess's Law
2:25 minutes
Problem 38b
Textbook Question
Textbook QuestionThe reaction of A with B to give D proceeds in two steps: (1) A + B → C ΔH° = -20 kJ (2) C + B → D ΔH° = +50 kJ (3) A + 2B → D ΔH° = ? (a) Which Hess's law diagram represents the reaction steps and the overall reaction? Diagram 1 Diagram 2
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