CHEM 1210 Lecture 1: Matter, Energy, and Measurements
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1:12 pm: chemistry: the study of matter and its composition, properties, and transformations, matter: anything that takes up space and has volume. Maintains its shape regardless of its container. Solid particles lie close together in a regular pattern. Takes the shape of its container and exhibits flow. Liquid particles are close together but can move past one another. Has no definite shape; it assumes the shape of its container. Has no definite volume; it assumes the volume of its container. Particles are very far apart and move around randomly. Physical properties can be observed or measured without changing the composition of the material. A physical change alters the material without changing its composition (change in state) Chemical properties determine how a substance can be converted into anothe substance. Chemical change is the chemical reaction that converts one substance into another. Ex: paper + oxygen --(heat)--> ash + water vapor: measurement. The number is meaningless without the unit on (changes: another.
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