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← ScienceWhich outcome occurs when pressurized hydrogen desorbs from a metal hydride storage vessel?
A)Decrease in electrical conductivity occurs
B)Endothermic cooling of the vessel results✓
C)Catalytic surface oxidation is accelerated
D)Hydrogen embrittlement risk decreases vastly
💡 Explanation
Spontaneous hydrogen desorption absorbs energy via endothermic phase transition; because the metal bonds weaken, the system cools. Therefore, cooling occurs, rather than heating, because hydrogen is being released rather than contained, preventing catalytic oxidation.
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