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Chapter 16
Vocab
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 from 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 vaportization | the amount of energy required for the liquid at its boiling point to become a gas. |
diffusion | spreading of particles throughout a given volume until they are uniformly distributed. |
plasma | matter consisting of positively and negatively charged particles. |
thermal expansion | increase in the size of a substance when the temperature is increase |
buoyancy | ability of a fluid - a liquid or a gas - to exert an upward force no 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 of pressure |