Which outcome occurs when an exhaust catalyst's temperature drops significantly below its light-off temperature?

💡 Explanation

Less heat energy lowers the reaction rate because Arrhenius equation shows that the rate constant is exponentially dependent on temperature. Since NOₓ reduction requires activation energy, this conversion decreases via suppressed reaction kinetics, rather than oxidation or water formation, requiring high temperature.

• Which outcome occurs when supercooled liquid tin undergoes rapid phase transition to solid at its melting point?
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