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← ScienceWhich consequence results when a chemical reactor's impeller speed falls critically during a polymerization?
A)Runaway reaction exceeds cooling capacity✓
B)Catalyst deactivation halts polymerization
C)Monomer evaporation increases reactor pressure
D)Increased polymer chain branching forms gels
💡 Explanation
If impeller speed drops, the heat transfer rate decreases, therefore localized hot spots initiate uncontrolled **exothermic reaction**. This positive feedback loop is a thermal runaway impacting cooling. The reactor exceeds cooling capacity rather than catalyst failure, because the heat is cause.
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