Summary Application and examples of zeroth law of thermodynamics for bsc physics students
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Course
Physics
Institution
The zeroth law of thermodynamics is one of the four principal laws of thermodynamics. It provides an independent definition of temperature without reference to entropy, which is defined in the second law. The law was established by Ralph H. Fowler in the 1930s, long after the first, second, and thi...
Zeroth Law of Thermodynamics Example
Zeroth Law of Thermodynamics states that heat energy flows between two bodies when
they are kept in contact with each other.
For example, if we take three bodies P, Q, and R at different temperatures which are in
contact with each other than the heat transfers among the three bodies till they reach
thermal equilibrium, in this case, they reach the constant temperature.
Thermal equilibrium can also be achieved even when the temperature of the bodies is
different.
For example, if we take two bodies A and B, and contain them in adiabatic chambers
(which do not allow heat to pass through them) then the, if they allow being in contact still
there, is no heat transfer as adiabatic chambers do not allow heat to pass through it so they
are considered to in thermal equilibrium.
The zeroth law of thermodynamics follows the translation relation between various bodies
i.e. if we take three bodies A, B, and C then if A and B are in thermal equilibrium and B and
C are in thermal equilibrium then A and c are also considered to be in thermal equilibrium.
Application of Zeroth Law of Thermodynamics
• The law is crucial for the mathematical formulation of thermodynamics, or, to put it
another way, for expressing the mathematical definition of temperature.
• The most common use of this concept is to compare the temperatures of different
things.
• If we want to accurately measure temperature, we’ll need a reference body and a
characteristic of that body that changes with temperature.
• The change In that characteristic could be interpreted as a temperature change. The
chosen feature is referred to as a thermodynamic property.
• Nonetheless, Thermometers are the most prevalent application of the zeroth law of
thermodynamics.
• Using a simple thermometer with mercury in a tube, we may witness the zeroth law
in operation.
• Because the area of the tube remains constant as the temperature rises, the
mercury expands.
• The height has grown as a result of this development.
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