A Study of Matter. Video Notes
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1 A Study of Matter Video Notes
2 In this lesson you will: Define physical property, chemical property and chemical change. Describe the phases of matter. Label properties as physical or chemical. Label changes as physical or chemical. State the Law of Conservation of Mass.
3 Physical properties Can be observed without chemically changing matter. We do not have to perform a chemical experiment to observe physical properties.
4 Physical properties Malleability- how easy a metal s shape can be changed. Density- the amount of matter in a given volume Color Shape Texture
5 Chemical Properties Describe how a substance interacts with other substances. Need to perform experiments to observe chemical properties.
6 Chemical Properties Reactivity- interact with other substances (corrosion of metals is an example) Combustibility-if it will burn Flammability-will ignite easily and burn vigorously.
7 Physical vs Chemical properties Chemical Properties Reactivity Combustibility Flammability Acidity Ability to rust Physical Properties Malleability Density Color Texture Solubility (able to mix without changing substance) Mass Phases of matter
8 Phases of Matter Solid, liquid, or gas
9 Solids Definite shape Definite volume Particles packed closely together
10 Liquid Indefinite shape Definite volume Particles have room to move although they are relatively close together
11 Gases Indefinite shape Indefinite volume Fill whatever container they occupy Particles are far apart and have a lot of room to move
12 Physical Change No change in identity of the substance.
13 Chemical Change One or more new substances are produced
14 Changes Ripping paper- P Crushing aspirin- P Melting ice cube- P (Phase changes are a special type of Physical change where no chemical changes occur but the state changes from solid to liquid to gas.)
15 Are physical changes Phase changes Freezing point is the temperature where liquid changes to solid Melting point is the temperature where a solid changes to a liquid. The freezing point and the melting point for a substance are the exact same!!
16 Phase changes Boiling point- liquid turns to a gas (water to water vapor) Condensation- where a gas turns to a liquid (the sweating on a glass that is colder than it s environment) Sublimation point- temperature at which a solid changes directly to a gas without first changing into a liquid. (dry ice)
17 Examples of changes Physical o Tearing, crushing, phase changes Chemical o Combustion, acid rain o Burning gas in cars is converted by combustion to carbon monoxide, carbon dioxide, water vapor, etc. o Acid rain is created by burning in factories
18 Law of conservation of mass Mass cannot be created or destroyed The mass of the substances will be the same before and after the reaction, even if the product of the reaction is different from the substance you started with.
19 Chemistry Quiz CR1. The instrument used to measure mass is the A. graduated cylinder B. ruler C. balance D. stopwatch
20 Chemistry Quiz CR2. What is the first thing you do in any conversion question? a. Figure out which conversion facts you need b. Punch numbers into the calculator c. Figure out if you need to multiply or divide d. Set up the problem in the question mark format.
21 Chemistry Quiz 1.Which of the following is NOT a physical property of the a wooden chair? 1.The chair is blue 2.The chair is made of wood 3.The chair will burn 4.The chair has four legs
22 Chemistry Quiz 2. A solid has a shape and a volume. 1.definite, definite Definite, indefinite Indefinite, definite Indefinite, indefinite
23 Chemistry Quiz 3. What is it called when a solid turns directly into a gas? 1.Melting Boiling Freezing sublimation
24 Chemistry Quiz 4. Which of the following would be classified as a chemical change? 1.Getting a haircut Painting a picture Lighting a campfire Melting an ice cube
25 Chemistry Quiz 5. Which of the following states that matter cannot be created or destroyed? 1.The matter law The law of conservation of mass The physical change law The law of chemical changes
26 Chemistry Quiz Answers CR1 c CR2 d 1 c 2 a 3 d 4 c 5 b
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