Physical and Chemical Properties of Matter
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1 Physical and Chemical Properties of Matter We are all surrounded by matter on a daily basis. Anything that we use, touch, eat, etc. is an example of matter. Matter can be defined or described as anything that takes up space, and it is composed of miniscule particles called atoms. It must display the two properties of mass and inertia. Introduction Properties of Matter Physical (Properties and Changes) Chemical (Properties and Changes) Example Problems References Outside Links Contributors Introduction The different types of matter can be distinguished through two components: composition and properties. The composition of matter refers to the different components of matter along with their relative proportions. The properties of matter refer to the qualities/attributes that distinguish one sample of matter from another. These properties are generally grouped into two categories: physical or chemical. Copyright The Regents of the University of California, Davis 1
2 Figure 1: Visual With Examples. Content from S.M. Properties of Matter 1. Physical (Properties and Changes) Physical Property- A physical property is one that is displayed without any change in composition. (Intensive or Extensive) 1. Intensive: A physical property that will be the same regardless of the amount of matter. density: m/v color: The pigment or shade conductivity: electricity to flow through the substance Copyright The Regents of the University of California, Davis 2
3 malleability: if a substance can be flattened luster: how shiny the substance looks 2. Extensive: A physical property that will change if the amount of matter changes. mass: how much matter in the sample volume: How much space the sample takes up length: How long the sample is Physical Change- Change in which the matter's physical appearance is altered, but composition remains unchanged. (Change in state of matter) Three main states of matter are: Solid, Liquid, Gas? Solid is distinguished by a fixed structure. Its shape and volume do not change. In a solid, atoms are tightly packed together in a fixed arrangement.? Liquid is distinguished by its malleable shape (is able to form into the shape of its container), but constant volume. In a liquid, atoms are close together but not in a fixed arrangement.? Gas is made up of atoms that are separate. However, unlike solid & liquid, a gas has no fixed shape and volume. Example: When liquid water (H 2 O) freezes into a solid state (ice) -- It appears different/changed; However, the composition is still: 11.19% hydrogen and 88.81% oxygen by mass. 2. Chemical (Properties and Changes) Figure 2: States of Matter Chemical Property: Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition. Examples: Alkali metals react with water; Paper's ability to burn. Chemical Change: Change in which one or more kinds of matter are transformed to new kinds of matter with altered compositions. (Or Chemical Reaction): Examples: Magnesium + Oxygen --> Magnesium Oxide or 2 Mg + O 2 --> 2 MgO Copyright The Regents of the University of California, Davis 3
4 Iron + Oxygen --> Iron Oxide/ Rust or 2 Fe + 3 O 2 --> Fe 2 O 3 [With higher knowledge of these different properties and changes, we receive a better understanding of the nature of different samples of matter that exist. Using the components of composition and properties, we have the ability to distinguish one sample of matter from the others.] Example Problems 1. Milk turns sour. This is a 2. HCl being a strong acid is a, Wood sawed in two is, Physical Change, Chemical Change, Physical Change, Chemical Change 3. CuSO 4 is dissolved in water 4. Aluminum Phosphate has a density of g/cm3 5. Which of the following are examples of matter? A Dog Carbon Dioxide Ice Cubes copper (II) nitrate A Moving Car 6. The formation of gas bubbles is a sign of what type of change? 7. True or False: Bread rising is a physical property. 8. True or False: Dicing potatoes is a physical change. Copyright The Regents of the University of California, Davis 4
5 9. Is sunlight matter? 10. The mass of lead is a property. Answers:1)chemical change 2)chemical property, physical change 3) physical change 4)physical property 5)All of the above 6) chemical 7) False 8) True 9) No 10) physical property References 1. Petrucci, Bissonnette, Herring, Madura. General Chemistry: Principles and Modern Applications. Tenth ed. Upper Saddle River, NJ 07458: Pearson Education Inc., Cracolice, Peters. Basics of introductory Chemistry An active Learning Approach. Second ed. Belmont, CA 94001:Brooks/Cole, Outside Links This video helps distinguish between physical and chemical changes as well as giving real life examples. Contributors Samantha Ma- UC Davis This page viewed times The ChemWiki has 5582 Modules. The ChemWiki was viewed a total of times Copyright The Regents of the University of California, Davis 5
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