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← ScienceWhich net outcome inevitably occurs when a sealed cryogenic tank undergoes self-pressurization?
A)Isenthalpic expansion cools remaining liquid
B)Reduced overall system entropy
C)Vapor pressure monotonically increases✓
D)Heat leaks perfectly match venting rate
💡 Explanation
Self-pressurization involves heat leak causing phase transition via vaporization, leading to pressure rise in the fixed volume because of increased gas molecules (Clausius-Clapeyron relation). Therefore, vapor pressure increases, rather than cooling, due to heat input, and entropy continually rises.
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