CHM 2040 Lecture 1: chapter 1

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3 Sep 2016
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-The scientific method (HOTEL)
1) hypothesis
2) observation
3) theory
4) experiment
5) law
-Classification of matter
-Physical separation methods
mechanical
filtration
extraction
distillation
chromatography
-Chemical reaction: ability to form something new with a chemical change
-Physical change: changes from one state to another and doesn’t involve changing the identity
of the matter
-Chemical change: transforms one type of matter into a new type of matter
-Intensive property: independent of the amount of matter being considered
-Extensive property: depends on the amount of matter
-subliming: solid to gas
-depositing: gas to solid
SIGNIFICANT FIGURES-
-Addition/subtraction: least number of decimal places
-Multiplication/division: least number of significant figures
-grad cylinder/ruler: estimate 1 digit
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