CHEM 1124Q Midterm: CHEM 1124Q - Term Test 1 - 2018 Winter
Document Summary
E. g. melting, freezing: chemical change: change in which identity of matter changes, original substance no longer exists. E. g. digestion, combustion: extensive properties: measured values of extensive properties depend on the amount of matter. Values of same extensive properties can be added together. e. g. mass and volume: intensive properties: measured values of extensive properties do not depend on the amount of matter. e. g. density and melting point. Chemistry is the study of matter, energy and the relationship between the two. Matter is anything that has mass and occupies space. Scientists follow a set of guidelines known as the scientific method: Identify patterns or trends in the collected data. With time a hypothesis may evolve into a theory. Set of conceptual assumptions that explains data. Properties that can be measured are called quantitative properties. A measured quantity must always include a unit. The english system has units such as the foot, gallon, pound, etc.
