Which effect dominates when hydrogen gas permeates through a palladium membrane?

💡 Explanation

When hydrogen contacts palladium, dissociative adsorption occurs because the hydrogen molecule splits into individual atoms bonding to the palladium surface, which lowers the activation energy for diffusion through the metal. Therefore adsorption enables permeation, rather than superficial diffusion (bulk effect), a pressure gradient (system driver only) or crystal defects, which offer only secondary benefits.

• Which outcome arises when a molecule vibrates at a frequency matching its resonant molecular frequency?
• Which outcome occurs when pressurized liquid water flows through a subcooled converging-diverging nozzle above its cavitation inception point?
• Which limitation dictates maximum efficiency of a Carnot heat engine operating between two thermal reservoirs?
• Which outcome occurs when moisture freezes within porous concrete during rapid cooling?
• Which consequence results during thin-film fabrication with mismatched refractive indices?
• Which outcome diminishes when imperfect laser coherence causes transverse modes?