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Which outcome occurs with ammonia synthesis at sub zero when catalysts pores constrict?

A)Reaction rate is markedly lowered
B)Catalyst undergoes thermal decomposition
C)Surface area increases substantially
D)Ammonia yield improves proportionally

💡 Explanation

The Haber-Bosch process slows substantially because quantum tunneling effects through contracted catalyst pores become relevant; therefore reaction rate drops, rather than increasing surface area since diffusion limitations are compounded.

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