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- https://chem.libretexts.org/Bookshelves/General_Chemistry/General_Chemistry_Supplement_(Eames)/Thermochemistry/The_Zeroth_Law_of_ThermodynamicsIf no change happens when they touch, we could say that they were in thermal equilibrium. (If we leave them in contact long enough, they will reach thermal equilibrium, but that is different from bein...If no change happens when they touch, we could say that they were in thermal equilibrium. (If we leave them in contact long enough, they will reach thermal equilibrium, but that is different from being in thermal equilibrium when they first touch.) If we have a system A, and we find that it is in thermal equilibrium with another system B, and also with another system C, then we know without doing the experiment that B and C are also in thermal equilibrium with each other.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(Fleming)/01%3A_The_Basics/1.01%3A_The_System_and_the_SurroundingsThe page discusses the Zeroth Law of Thermodynamics, emphasizing the importance of defining key terms like "system" and "surroundings." Various types of systems are identified, such as open, closed, a...The page discusses the Zeroth Law of Thermodynamics, emphasizing the importance of defining key terms like "system" and "surroundings." Various types of systems are identified, such as open, closed, and isolated systems, based on how they allow matter and energy transfer. The distinctions between homogeneous and heterogeneous systems are also outlined, along with the significance of intensive and extensive variables.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/The_Live_Textbook_of_Physical_Chemistry_(Peverati)/02%3A_Zeroth_Law_of_Thermodynamics/2.02%3A_The_Zeroth_Law_of_ThermodynamicsThe mathematical definition that guarantees that thermal equilibrium is an equivalence relation is called the zeroth law of thermodynamics. The zeroth law of thermodynamics states that if two thermody...The mathematical definition that guarantees that thermal equilibrium is an equivalence relation is called the zeroth law of thermodynamics. The zeroth law of thermodynamics states that if two thermodynamic systems are each in thermal equilibrium with a third one, then they are in thermal equilibrium with each other.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(Fleming)/01%3A_The_Basics/1.04%3A_The_Zeroth_Law_of_ThermodynamicsThis page explains the concept of temperature and how it is measured using thermometers. It highlights the relevance of the zeroth law of thermodynamics for temperature measurement, stating that if sy...This page explains the concept of temperature and how it is measured using thermometers. It highlights the relevance of the zeroth law of thermodynamics for temperature measurement, stating that if system A is in thermal equilibrium with system B, and system B with system C, then systems A and C share a temperature. The International Practical Temperature Scale of 1990 (IPT-90) is mentioned as a standard, utilizing physical properties of substances to define precise temperature measurements.
