Synopsis:
 How the properties of atoms determine the properties of matter
 Solution: probabilities
 A statistical description of a system can be made in terms of the distribution f(r,v,t)
 number of molecules= f(space range, velocity range, time range)
 Statistical Mechanics: statistical description of ensembles of discrete molecules (spheres) obeying classical mechanics and subject to perfectly elastic collisions)
 Relationship between Mechanics (which is reversible in time) and Thermodynamics (which is irreversible)
 Many different microscopic states of a system result in the same macroscopic state
 Boltzmann's statistical definition of entropy: the entropy of a macrostate is the logarithm of the number of its microstates
 S = K * Log(W)
 Entropy is a measure of disorder in a system
 Boltzmann's eternal doom: the universe must evolve in the direction of higher and higher entropy
 The universe is proceeding towards the state of maximum entropy
