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hermal Equilibrium

# hermal Equilibrium - hermal Equilibrium Thermodynamics...

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hermal Equilibrium Thermodynamics deals with the internal energies of systems and is governed by a set of laws (similar to Newton's law for mechanics). The central concept of thermodynamics is the temperature T. Properties of many bodies change as their thermal environment is altered. When the temperature increases, the volume of a liquid increases, the length of a metal rod increases, the electrical resistance increases, the pressure of a confined gas increases, etc. If we know the change in these parameters as a function of the temperature, we can use them to measure the temperature. The device is then called a thermometer . In order for a thermometer to measure the temperature of a body, it must be in intimate contact with the body. After making contact, every measurable property of the thermometer and the body assumes a stable value, and the bodies are said to be in thermal equilibrium . If the thermometer is also in thermal equilibrium with a second body than the two bodies are also in thermal equilibrium. This is called the

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hermal Equilibrium - hermal Equilibrium Thermodynamics...

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