Chemistry Regents Practice Test 2025 – Complete Prep Resource

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What is sublimation in terms of phase changes?

A liquid changing to a solid

A solid transitioning directly to a gas

Sublimation is defined as the process in which a solid transitions directly into a gas without first becoming a liquid. This phase change occurs under specific conditions, typically at low pressure and/or high temperature. A familiar example of sublimation is dry ice (solid carbon dioxide), which directly converts into carbon dioxide gas at room temperature while skipping the liquid phase altogether.

The correct understanding of sublimation helps in grasping the nature of phase changes and the states of matter, highlighting how substances can shift between these states without following the conventional path of liquid formation first.

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A gas changing back to a liquid

A solid turning into plasma

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