Bond enthalpies
Bond enthalpies
Formula
ΔH = Σ(bonds broken) − Σ(bonds formed)
Real World
When Dyson designs batteries, chemists use average bond enthalpies to estimate whether a new electrolyte molecule will release or absorb energy during decomposition reactions.
Exam Focus
Bond enthalpies give approximate ΔH only — state 'average bond enthalpies are used' to avoid losing marks for accuracy.
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