Identify each of the following changes of state as melting,...

Identify each of the following changes of state as melting, freezing, sublimation or deposition: a. Ice sculptures start breaking down as temperature rises above $0^{\circ} \mathrm{C}$ b. Ice forms on the strawberry plants on a cold wintry night. c. Water becomes solid at $0^{\circ} \mathrm{C}$. d. Dry ice on heating becomes gas.

Identify each of the following changes of state as melting, freezing, sublimation or deposition:
a. Ice sculptures start breaking down as temperature rises above $0^{\circ} \mathrm{C}$
b. Ice forms on the strawberry plants on a cold wintry night.
c. Water becomes solid at $0^{\circ} \mathrm{C}$.
d. Dry ice on heating becomes gas.

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Key Concepts

Freezing

Freezing is the transition of a liquid into a solid state. In this process, the liquid loses thermal energy, and its molecules arrange into a more stable, ordered structure, forming a solid.

Deposition

Deposition is the reverse of sublimation, where a gas transforms directly into a solid without passing through the liquid phase. This process usually occurs under conditions where the gas releases energy quickly, allowing molecules to bond into a solid structure.

Phase Transitions

Phase transitions refer to the changes between the distinct states of matter—solid, liquid, and gas. These changes occur when thermal energy is added or removed, causing the arrangement of molecules to change, thereby altering the physical state of a substance.

Melting

Melting is the process by which a solid turns into a liquid. This occurs when the solid absorbs enough thermal energy to overcome the forces maintaining its fixed structure, resulting in a fluid, less-ordered state.

Sublimation

Sublimation is the direct change of a substance from its solid form into a gas, bypassing the liquid phase. This phase transition typically occurs under conditions of low pressure or with substances that have high vapor pressures at lower temperatures.

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