Chemistry matter and its changes pdf

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Chemists study the structures, physical properties, and chemical properties of material substances. These consist of matter , which is anything that occupies space and has mass. - Goodreads helps you keep track of books you want to read.

There are two types of change in matter: physical change and chemical change. Many physical changes are reversible such as heating and cooling , whereas chemical changes are often irreversible or only reversible with an additional chemical change. Another way to think about this is that a physical change does not cause a substance to become a fundamentally different substance but a chemical change causes a substance to change into something chemically new. Blending a smoothie, for example, involves two physical changes: the change in shape of each fruit and the mixing together of many different pieces of fruit. Because none of the chemicals in the smoothie components are changed during blending the water and vitamins from the fruit are unchanged, for example , we know that no chemical changes are involved. Cutting, tearing, shattering, grinding, and mixing are further types of physical changes because they change the form but not the composition of a material. For example, mixing salt and pepper creates a new substance without changing the chemical makeup of either component.