If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion?
Correct answer: A. Film
- A. Film
- B. Ash layer
- C. Pore
- D. None of these
Explanation
At very high temperature, the chemical reaction is usually fast, so transport through the external gas film becomes the limiting step. Diffusion through the ash layer or pores is more likely to control under other conditions.
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