Energy Is Not Enough

Two molecules collide a billion times a second and almost never react. A successful collision needs two things at once — enough energy AND the correct orientation — and the second one is the condition students drop. Watch a molecule clear the barrier by a mile and bounce off anyway.

8 STEPS · 6 QUICK CHECKS · NO + O₃ → NO₂ + O₂ · E_a = 10.5 kJ/mol · v1