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Basics of Molecular Physics and Thermodynamics

September 02, 2021

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Molecular physics is a branch of physics that studies the interactions of molecules, and thermodynamics is the science of heat flow. Thermo is heat and dynamics is the movement of heat. Thermodynamics has been developed largely since the 1800s, at the time of the Industrial Revolution, when steel was being tamed. The period when fossil fuel burning power generation began and the associated CO2 and global warming issues. In fact, it is interesting to note that the first calculations of the impact of CO2 on the climate were made by the physical chemist Arrhenius. He calculated what will happen with this burning of fossil fuels. Basically, his calculation was correct. He figured out that in the year 2000, since when he made the calculation, people should have problems. But since his calculations, we have an exponential increase in the amount of CO2 in the atmosphere, so now humanity is really in trouble.

Thermodynamics is all around us, and in us living creatures. In biological systems (warm-blooded animals), sugars, proteins, fats and other substances are burned, and thus these systems generate heat. The released heat from the nuclear reactor is converted into motion and then into electrical energy. We also change matter through thermodynamics. Thermodynamics was developed in the period before the knowledge of atoms and molecules. Until then, this was the basis of the macroscopic properties of matter. Nowadays, when we have a lot of knowledge about atoms and molecules, we have knowledge of matter at the microscopic level and explanations of thermodynamic phenomena are much more rational (Bawendi; Nelson, 2008).

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