Match each change of state with its description. sublimation

vaporization that occurs at the

surface of a liquid

vaporization that occurs below the

surface of a liquid

evaporation

freezing

the process by which a solid becomes

a gas

the process by which a liquid

becomes a solid

melting

the process by which a solid becomes

a liquid

boiling

Matching each change of state with its  description ;

During sublimation a solid changes directly from its solid state to its gaseous state without first changing to its liquid state.  example : change of dry ice from solid to gas when exposed to air ,

Evaporation is the change of state of a liquid substance to its gaseous usually below its boiling point. this occurs at the surface of the liquid.

During freezing a liquid ( usually water ) subjected to temperatures below 0°C  which changes its state from liquid water to ice ( solid  )

Melting process is done by heating up a solid substance at very high temperature beyond the melting point of the substance until the solid substance changes its form to liquid.

Boiling takes place below the surface of a liquid .

Hence we can conclude that the change of state and their description are as follows Sublimation the process by which a solid becomes gas Evaporation vaporization that occurs at the surface of a liquid, Freezing The process by which a liquid becomes a solid, Melting The process by which a solid becomes a liquid, Boiling vaporization occurs below the surface of a liquid.

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the process by which a solid becomes a liquid - melting.

the process by which a liquid becomes a solid - freezing.

the process by which a solid becomes a gas - sublimation.

vaporization that occurs at the surface of a liquid - evaporation.

vaporization that occurs below the surface of a liquid - evaporation.

Explanation:

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the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.