The photo below shows elemental iodine dissolving in ethanol to give a solution. Is this a physi

step 1 In this question we're asked if elemental iodine dissolving in ethanol gives a physical or chemi

The photo below shows elemental iodine dissolving in ethanol...

Key Concepts

Chemical Change

A chemical change occurs when substances undergo a reaction that transforms them into new substances with different chemical compositions and properties. This transformation involves breaking and forming chemical bonds, often accompanied by energy changes such as the release or absorption of heat, light, or sound. Chemical changes are typically irreversible under normal conditions because the original molecules no longer exist in the same form as before the reaction.

Dissolution

Dissolution is the process by which a solute mixes with a solvent to form a homogeneous solution. In this process, the intermolecular interactions allow the solute particles to disperse uniformly throughout the solvent without changing the chemical structure of the solute. Dissolution is typically considered a physical process because it involves only the physical separation of molecules rather than any chemical reaction that alters the composition of the substance.

Physical Change

A physical change involves a process where the form or state of matter is altered without changing the chemical composition of the substance. In a physical change, the molecules remain intact, meaning the properties of the substance remain the same even if its appearance or state changes. This type of change includes processes like melting, freezing, or dissolving, where the original substance can typically be recovered without forming new compounds.

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