click below
click below
Normal Size Small Size show me how
Chapter 16
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 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. |