Given A → B (ΔH = +20) and B → C (ΔH = −50), ΔH for A → C is
- Acheck_circle
−30 kJ
- B
+30 kJ
- C
+70 kJ
- D
−70 kJ
Explanation
Sum: 20 + (−50) = −30 kJ.
Hess's Law
AP Chemistry· difficulty 3/5
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