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chapter 16
Term | Definition |
---|---|
kinetic theory | expalanation of the behaveior 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 | increasing in the size of a substance when the temperature is increased |
buoyancy | ability of 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 |