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Which outcome occurs when a substance nears its triple point during a rapid adiabatic expansion?

A)Simultaneous sublimation and condensation
B)Dominant melting over freezing phase
C)Runaway solidification due to energy loss
D)Equilibrium shift toward plasma formation

💡 Explanation

When substance approaches triple point with rapid adiabatic expansion, it causes pressure and temperature drop resulting in all three phases (solid, liquid, gas) coexisting and direct solid-gas or gas-solid phase change via sublimation and condensation due to energy exchange. Therefore simultaneous processes occur, rather than melt/freeze dominance, runaway solidification, or plasma formation which require non-equilibrium energy conditions.

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