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Which outcome occurs when liquid hydrogen peroxide (H₂O₂) decomposes at high concentration inside a spacecraft propellant tank?

A)Rapid pressure increase due to adiabatic compression
B)Catalyst surface poisoning by peroxide adsorption
C)Hydrogen embrittlement weakens tank walls
D)Spontaneous combustion from oxygen dismutation

💡 Explanation

Rapid pressure increase occurs because exothermic decomposition of H₂O₂ rapidly releases gaseous oxygen and heat via adiabatic compression. Heat increases kinetic energy, therefore, pressure rises faster than volume increases, rather than simple expansion with constant heat input.

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