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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 vaporization | 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 increased |
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 of pressure |