What is the physical state of water immediately after it escapes food during sublimation?
Answer
Water vapor
During the sublimation phase of freeze-drying, the goal is to remove water without allowing it to return to a liquid state, which would damage the food's structure. By manipulating chamber pressure and heat, the solid ice turns directly into water vapor, which is the gaseous form of water. This gaseous escape ensures the structural integrity of the food remains intact, allowing it to maintain its original shape and rehydrate properly when needed.
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