For the bond-energy cycle shown, ΔH(reaction) equals which sum?
- A
0 because bonds always cancel
- B
bonds broken + bonds formed
- Ccheck_circle
(bonds broken) - (bonds formed)
- D
(bonds formed) - (bonds broken)
Explanation
Energy is required to break bonds (positive) and released when bonds form (negative): ΔH = ΣBE(broken) - ΣBE(formed).