The thermal heterogeneous decomposition of gaseous Hydrogen Iodide () occurring specifically on the solid surface of hot gold is a classical, widely tested textbook mechanism. What is the fundamental

Question

The thermal heterogeneous decomposition of gaseous Hydrogen Iodide ($HI$) occurring specifically on the solid surface of hot gold is a classical, widely tested textbook mechanism. What is the fundamental kinetic order of this specific high-pressure catalytic surface reaction?

Prashant Kotian · Accepted Answer

Correct answer: A. At high initial pressures, the available active sites on the solid catalytic gold surface quickly become entirely saturated with molecules. Because the physical surface can accommodate no more reactant, adding further gas mass cannot alter the decomposition rate, locking the kinetics firmly to a strictly constant Zero Order regime.

💡 Solution & Explanation

Practice 22,000+ questions like this