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Which outcome occurs at isobaric conditions during a substance transition?

A)Temperature remains constant upon energy change
B)Volume decreases proportionally to entropy decrease
C)Pressure exhibits rapid cyclical oscillations
D)Enthalpy reaches a global minimum value

💡 Explanation

During a phase transition at constant-pressure, the energy added or removed changes the substance's phase while Temperature remains constant; this is due to latent heat transfer, rather than altering the materials kinetric energy. Therefore temperature stabilizes; rather than oscillating, enthalpy decreasing further, or volume immediately tracks entropy.

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