The laws of thermodynamics
Chemical-engineering thermodynamics: definitions and fundamental laws

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J1025 V3 Article

The laws of thermodynamics


Chemical-engineering thermodynamics: definitions and fundamental laws

Authors : Romain PRIVAT, Jean-Noël JAUBERT

Publication date: February 10, 2022 | Lire en français

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3. The laws of thermodynamics

A postulate is a law that cannot be proven and remains valid as long as it is not contradicted by experimental evidence.

3.1 Thermal equilibrium and the zeroth law

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3.1.1 Empirical definition of temperature

Everyday experience teaches us that some objects are warm and others are cold. What our bodies intuitively sense is not temperature but heat transfer. An object feels cold to a person who places their hand on it when a flow of heat moves from the...

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