Boltzmann distribution, partition function, and internal energy L2 4449

Описание: This video introduces the Boltzmann distribution and uses it to solve for the population probabilities in a 2-level quantized system.
The internal energy is also calculated.
NOTE: The last problem should read "Temperature when one third of the molecules are in the excited state." I incorrectly said, "half" and wrote half, but the computation was the computation when the population in the upper state is half the population in the ground state.

Description
These are videos of Dr. Williams’ CHEM 4449 Physical Chemistry Lectures at Sam Houston State University in the Spring of 2018. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student.
This course begins with the quantum world established in the first semester CHEM 4448 and explores the statistical basis of thermodynamics, classical thermodynamics, heat engines, phase diagrams, fluid properties, transport phenomena, and energy sources, sinks, and conversions on a global scale. It is a fascinating trip from the quantum to the universe in 3.5 months.
Dr. Williams’ campus page is: http://www.shsu.edu/chm_dlw/
His science blog is: https://pchem4all.com/
His LinkedIn profile is:   / darren-l-williams-pchemist  

Keywords
SHSU, Quantum Mechanics, Statistical Thermodynamics, Heat, Work, Internal Energy, Entropy, Enthalpy, Gibbs Free Energy, Helmholtz Free Energy, Equilibrium, Heat Engines, Phase Diagrams, Azeotrope, Partially Miscible Liquids, Eutectic, Contact Angle, Hansen Solubility Parameters, Density, Surface Tension, Surface Energy, Viscosity, Vapor Pressure, Molar Volume, Carnot Cycle, State Variables, Coal, Crude Oil, Natural Gas, Nuclear Power