Thermodynamics

Density anomaly of water in the temperature range between 4 °C and 0 °C (negative thermal expansion)

Density anomaly of water (negative thermal expansion)

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Density anomaly refers to the paradoxical behavior of a substance to expand suddenly when cooling down instead of contracting further (anomalous decrease in density). https://youtu.be/tQ2JWasd0Yg Negative thermal expansion (density anomaly) Due to its special...
Speed distribution of an ideal gas for different temperatures

Maxwell–Boltzmann distribution

The Maxwell-Boltzmann distribution describes the distribution of the molecular speed of the molecules in ideal gases. https://www.youtube.com/watch?v=wjflAaq2amg Introduction As already explained in the article Temperature and particle motion, the temperature of a gas is...
Schematic illustration of an evaporation process

Why do liquids evaporate?

In this article, learn how the evaporation of liquids can be qualitatively explained using the Maxwell-Boltzmann distribution. Maxwell-Boltzmann distribution of ideal gases The figure below shows the speed distribution according to Maxwell-Boltzmann for...

Temperature scales

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Learn more about the origin of the Celsius, Fahrenheit, and Kelvin temperature scales in this article. https://youtu.be/TDGU0kzHQyc Introduction In everyday life, temperature is often understood as a quantity that expresses the property of a...
Why does metal feel colder or warmer than wood depending on the temperature?

Why does metal feel colder than wood (human thermal response)?

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Find out in this article why metal feels colder than wood of the same temperature, while at higher temperatures the metal suddenly feels warmer than wood. The property of an object to...
Illustration of Brownian particle motion with balls

Temperature and particle motion

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The higher the temperature of a substance, the greater the kinetic energy of the particles! https://youtu.be/nhFTx9B3m7w Temperature If matter is heated and thus its temperature rises more and more, it can be seen that...
Particle model of matter (oxygen, hydrogen, water)

Particle model of matter

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The particle model imagines matter made up of individual particles (atoms, molecules)! https://www.youtube.com/watch?v=KBmhSd7wb5Y The particle model of matter The central model for the description of thermodynamic processes is the particle model, which will be...