先进材料疑固实验室 Macro&microstate link Laboratory of Advanced Materials Solidification Macrostate: Be characterized by a few state variables,such as T,V,and U etc. Be the state of all particles in the system. Passes very rapidly through many microstates during the observation time. For example: An atom in a solid vibrates at a frequency in the order of 1013 s-1 Gas molecules have velocities of order of 102 ms-1 When we observe a property of a system,we really see the average of this property in all of the microstates that the material passed through during the observation time. 上海充通大￥ SHANGHAI JIAO TONG UNIVERSITYMacro&microstate link Macrostate: Be characterized by a few state variables, such as T, V, and U etc. Be the state of all particles in the system. Passes very rapidly through many microstates during the observation time. For example: An atom in a solid vibrates at a frequency in the order of 1013 s-1 Gas molecules have velocities of order of 102 ms-1 When we observe a property of a system, we really see the average of this property in all of the microstates that the material passed through during the observation time