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Matter in Chemistry

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More Lessons for High School Chemistry

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A series of free High School Chemistry Video Lessons.

In this lesson, we will learn

  • Physical Matter Properties and Chemical Matter Properties
  • States of Matter
  • Changes in Matter

Physical Matter Properties - Chemical Matter Properties
Physical matter properties include color, odor, density, melting point, boiling point and hardness. Physical properties are divided into intensive and extensive properties. Intensive properties are used to identify a substance and do not depend upon the amount of substance (density). Extensive properties depend on the quantity of the substance (mass, volume). Chemical matter properties include flammability and reactivity.
The physical and chemical properties of matter.
States of Matter
States of matter are the different phases which matters can take - gas, liquid and solid. Gas has no fixed shape and conforms to the volume of its container. A liquid has a distinct volume but assumes the shape of its container. A solid has definite shape and volume, regardless of its container. In the case of H20 steam is a gas, water is a liquid and ice is a solid. Most substances are more dense in their solid form, but water is an exception.
The properties of the three phases of matter. A look at KMT (kinetic molecular theory) applied to gases to start. Graham's and Dalton's law will be introduced. Also, some problem solving included as well.

Introduction to the states or phases of matter.
The Changes and Phases of Matter
Changes in matter can be classified as either physical or chemical, like matter properties. Physical changes include changes in physical appearance but not composition. All changes in state of matter are physical changes. Chemical changes involve changes in chemical composition and require chemical reactions.
The 5 phases of matter are BEC, solid, liquid, gas and plasma. The difference in each phase depends on the amount of kinetic energy (KE). The more kinetic energy the better the particles can overcome the attractive forces and move apart.

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