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← ScienceWhich risk increases when operating a Haber-Bosch reactor vessel near theoretical equilibrium?
A)Runaway exothermic reaction
B)Catalyst active site poisoning
C)Increased ammonia conversion rate
D)Pressure vessel structural fatigue✓
💡 Explanation
Operating too close to theoretical equilibrium requires very high pressures to maximize yield. The increasing cyclical stresses accelerate metal fatigue because the increased thermal and mechanical stresses cause crack propagation, therefore decreasing the lifespan, rather than reactions speeding up.
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