Question

why is it difficult to classify dissolving as simply a physical or a chemical change? (1 point) some substances keep the same color when they dissolve, and others do not. some substances release energy when they dissolve, and some absorb energy. some substances taste the same after they dissolve, and others do not. some substances keep the same molecular structure when they break down, and others do not.

Explanation:

Physical changes involve no new - substance formation, while chemical changes do. Dissolving can be complex as some substances may just disperse (physical), but others may react with the solvent (chemical). For example, sugar dissolving in water is a physical change as it's just dispersion, but some metal salts dissolving may involve ion - solvent interactions that could be considered chemical. The outcome of dissolving varies in terms of molecular structure, taste, energy, and color changes, making it hard to simply classify as physical or chemical.

Answer:

Some substances release energy when they dissolve, and some absorb energy.