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Chapter 16 vocab
Vocabulary
Term | Definition |
---|---|
Kinetic theory | explanation of the behavior of molecules in matter; states that all matter is made of constantly moving particles that collide without losing energy. |
melting point | temperature at which a solid begins to liquefy. |
heat of fusion | amount of energy required to change a substance form the solid phase to the liquid phase. |
boiling point | the temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid. |
heat of vaporization | amount of energy required for the liquid at its boiling pint to become a gas. |
diffusion | spreading of particles throughout a given volume until they are uniformly distributed. |
plasma | matter consisting of positively and negative areas; polar materials attract water molecules and dissolve easily in water. |
thermal expansion | sum of the kinetic and potential energy of the particles in an object; is transferred by conduction, convection, and radiation. |
buoyancy | ability of a fluid - a liquid or a gas - to exert an upward force on an object immersed in the fluid. |
pressure | amount of force exerted per unit area; SI unit is the pascal. |
viscosity | a fluid's resistance to flow. |
Pascal | SI unit for pressure. |