Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Intensive properties
Document related concepts
Transcript
Unit 1 Notes 3 Types of Matter Extensive vs. Intensive Properties • Mass is an extensive property—a property that depends on the amount of stuff you have. • Other properties that are extensive would include size, shape, etc. • Intensive properties are ones that only depend on what kind of stuff you have, like color, etc. Intensive or Extensive? • • • • • • • Mass Color Density Shape Melting point Texture Flammable PHYSICAL PROPERTIES • A quality or condition of a substance that can be observed or measured without changing the substance’s composition • What are some examples? color solubility odor Density and hardness Melting point Boiling point STATES OF MATTER • Matter’s state is a physical property solid gas liquid Definite shape, definite volume No definite shape, definite volume No definite shape, no definite volume SIDENOTE: • A gaseous substance that is found as a solid or liquid at room temperature is called vapor. PHYSICAL CHANGES • A physical change is one that does not involve altering the chemical composition. CHEMICAL REACTIONS • The ability of a substance to react and form new substances is called a chemical property. • In a chemical reaction, one or more substances change into new substances. • A reaction starts with the reactants, and the substances formed are called products. 4 CLUES TO CHEMICAL REACTION Color change Heat/light produced/ absorbed Solid from a liquid Gas formed CHEMICAL OR PHYSICAL CHANGE? • • • • • • • • Baking cookies Boiling water Dissolving salt Burning firewood Milk spoiling Metal rusting Tearing paper Melting ice LAW OF CONSERVATION OF MASS • During any chemical reaction, the quantity of matter is unchanged. The mass of the products always equals the mass of the reactants.
