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Which outcome occurs when system temperature significantly increases exceeding the rate constant assumptions in an exothermic reaction?

A)Runaway reaction accelerating exponentially
B)Equilibrium shift favoring reactants
C)Catalyst deactivation halting reaction
D)Increased product selectivity stabilizing rate

💡 Explanation

When the temperature increases significantly, the reaction rate will increase exponentially, exceeding the rate constant's validity range because of the Arrhenius equation dependency, causing a thermal runaway. Therefore a runaway reaction will occur, rather than equilibrium shift, catalyst deactivation, or increased product which require more controlled conditions.

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