So to sum up, when matter is transitioning from solid to liquid (melting) or liquid to solid (freezing<span>), its </span>temperature<span> is fixed at the </span>melting/freezing<span> point, which is the </span><span>same temperature</span>
Ex. Air freshener.
simple diffusion is the process of a substance (such as air freshener) moving from high concentration to low concentration with little to no energy.
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Because a chemical change occurred. heating, baking, cooking are can cause chemical changes. color change most frequently represents a chemical change