Chapter 1 StudentLecture_Fall09

Chapter 1 StudentLecture_Fall09 - CHEM 1150 General...

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Chapter 1 Matter, Measurement, and Problem Solving CHEM 1150: General Chemistry
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Chapter 1 Learning Objectives 1.1 Atoms and Molecules 1.2 The Scientific Approach 1.3 Classification of Matter 1.4 Physical and Chemical Changes/Physical and Chemical Properties 1.5 Energy 1.6 Units of Measurement 1.7 Reliability of Measurement Homework Problems: 34, 38, 42, 46, 50, 52, 56, 58, 62, 66, 68, 72, 74, 76, 78, and 84.
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Tro, Chemistry: A Molecular Approach 3 1.1 Atoms and Molecules atoms are submicroscopic particles are the fundamental building blocks of all matter molecules two or more atoms attached together attachments are called bonds attachments come in different strengths molecules come in different shapes and patterns Chemistry is the science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules
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Tro, Chemistry: A Molecular Approach 4 Structure Determines Properties the properties of matter are determined by the atoms and molecules that compose it 1. composed of one carbon atom and two oxygen atoms 2. colorless, odorless gas 3. incombustible 4. does not bind to hemoglobin carbon dioxide 1. composed of one carbon atom and one oxygen atom 2. colorless, odorless gas 3. burns with a blue flame 4. binds to hemoglobin carbon monoxide
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Tro, Chemistry: A Molecular Approach 5 Hypothesis – a tentative interpretation or explanation for an observation falsifiable – confirmed or refuted by other observations tested by experiments – validated or invalidated when similar observations are consistently made, it can lead to a Scientific Law a statement of a behavior that is always observed summarizes past observations and predicts future ones Law of Conservation of Mass 1.2 The Scientific Approach to Knowledge
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Tro, Chemistry: A Molecular Approach 6 From Specific to General Understanding a hypothesis is a potential explanation for a single or small number of observations a theory is a general explanation for the manifestation and behavior of all nature models pinnacle of scientific knowledge validated or invalidated by experiment and observation
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Tro, Chemistry: A Molecular Approach 7 Practice Question: Which of the following is a hypothesis? A.) Bubbles form when a liquid is heated in a tea pot. B.) The bubbles are the gas state of the original liquid. C.) The molecules in the liquid have enough energy to escape. D.) We can test whether the bubbles are the gas state of the liquid by removing the heat, at which point the gas should condense.
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Tro, Chemistry: A Molecular Approach 8 1.3 Classification of Matter matter is anything that has mass and occupies space we can classify matter based on whether it’s solid, liquid, or gas
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Tro, Chemistry: A Molecular Approach 9 Classifying Matter by Physical State matter can be classified as solid, liquid, or gas based on the characteristics it exhibits State Shape Volume Compress Flow Solid
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Chapter 1 StudentLecture_Fall09 - CHEM 1150 General...

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