45. If there is no change in composition during a physical change, then there is no change in the appearance of the substance. Is this statement TRUE or FALSE. Justify?1 pointTrue, because physical change means no change in composition and appearanceFalse, because physical change means no change in composition but the appearance does change. For example, crushing can or boiling water are physical processes but they do change the physical appearance of the original substance (although the chemical composition or identity does not change)
Question
45. If there is no change in composition during a physical change, then there is no change in the appearance of the substance. Is this statement TRUE or FALSE. Justify?1 pointTrue, because physical change means no change in composition and appearanceFalse, because physical change means no change in composition but the appearance does change. For example, crushing can or boiling water are physical processes but they do change the physical appearance of the original substance (although the chemical composition or identity does not change)
Solution
The statement is FALSE. While it's true that a physical change does not alter the composition of a substance, it can certainly change its appearance. For instance, when water is boiled, it changes from a liquid to a gas, which is a clear change in appearance. Similarly, crushing a can changes its shape, but not its composition. Therefore, a physical change does not necessarily mean there will be no change in appearance.
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