Calculateur d'Énergie d'Activation (Arrhenius) — Formule
## Atom Economy
Atom economy (atom efficiency) measures how much of the reactant atoms are incorporated into the desired product. It is a green chemistry metric independent of yield.
### Formula
**Atom Economy = (MW of desired product / sum of MW of all products) × 100%**
Reactions with high atom economy produce less waste by design. Addition reactions (100% atom economy) are preferred over substitution or elimination reactions that generate byproducts.
Atom economy (atom efficiency) measures how much of the reactant atoms are incorporated into the desired product. It is a green chemistry metric independent of yield.
### Formula
**Atom Economy = (MW of desired product / sum of MW of all products) × 100%**
Reactions with high atom economy produce less waste by design. Addition reactions (100% atom economy) are preferred over substitution or elimination reactions that generate byproducts.
Exemple Résolu
A reaction produces a desired product (MW=180) and a byproduct (MW=40).
- Atom economy = (180 / 220) × 100 = 81.82%
- Waste fraction = 100 - 81.82 = 18.18%