Statistical physics is the holy grail of Physics. It has taught us a great many lessons in the universe and will definitely teach us more. Statistical physics aims at studying the macroscopic parameters of a system in equilibrium from the knowledge of the microscopic properties using the law of mechanics. This approach is different from thermodynamics that studies the macroscopic system in equilibrium from the macroscopic standpoint without considering the microscopic parameters.
Statistical physics can be defined as,
The branch of physics where a scheme to calculate the free energy is formulated. In statistical physics, we use the fact that matter consists of atoms. On the basis of a knowledge of the microscopic laws that govern the motion of atoms and most importantly an additional law of statistical physics, it gives a general expression for the free energy.
Statistical physics can study both thermal equilibrium states and non-equilibrium states.
Why do we need a statistical description?
Statistics used in physics render a conceptual link between the macroscopic and the microscopic view. For example, when studying gases, we can examine the statistical distribution of particle velocities and gain an understanding of the relationship between the macroscopically observable quantities such as the pressure, volume, and temperature. Given below in a table, are a few of its applications:
Application of Statistical Physics
Following are the statistical physics applications:
- The first statistical physics application was concentrated on the distribution of molecules in an assembly. It was applied in Maxwell’s distribution of molecular velocity.
- Gibb’s explained the thermodynamics with the help of statistical physics.
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