Download
1 / 6
60 likes | 175 Vues
Chemistry is the study of matter, its properties, and transformations. Matter is anything with mass that occupies space. Physical properties include color, odor, lustre, texture, ductility, malleability, melting point, boiling point, and state at room temperature (solid, liquid, gas). In contrast, chemical properties describe how substances change to form new materials, such as burning, reactivity with air or water, and responses to heat. Changes can be physical or chemical, with chemical changes involving the formation of new substances, indicated by color changes, heat absorption or release, gas formation, and precipitation.
E N D
CHEMISTRY The study of matter, its properties, and its changes Matter – anything that has mass and takes up space
Physical Properties • characteristic of a substance • colour • odour • lustre • texture • ductility • malleability • melting point • boiling point • state of matter at room temperature (solid, liquid, or gas).
Chemical Properties • the way a substance changes to create something new Common Chemical Properties: • ability to burn – flame, heat • flash point – lowest temp. a flammable liquid will ignite • behaviour in air – react or tarnish • reaction with water – corrode or dissolve • reaction to heating – melt or decompose
Physical Change • nothing new is created • ex a change in the state of matter • dissolving or melting • doesn’t change the chemical properties
Chemical Change • when a substance changes to create something new • there are 5 signs of a chemical change: • colour changes • heat or light produced or absorbed • bubbles of gas are formed • solid material forms (precipitate) • change is difficult to reverse
