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Topic: Conjugate variables (thermodynamics)

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	Conjugate variables (thermodynamics) - Wikipedia, the free encyclopedia
		In thermodynamics, the internal energy of a system is expressed in terms of pairs of conjugate variables such as pressure/volume or temperature/entropy.
		The thermodynamic force is always an intensive variable and the displacement is always an extensive variable, yielding an extensive energy transfer.
		The intensive (force) variable is the derivative of the internal energy with respect to the extensive (displacement) variable, while all other extensive variables are held constant.
	en.wikipedia.org /wiki/Conjugate_variables_(thermodynamics) (808 words)

	Thermodynamic potentials - Wikipedia, the free encyclopedia
		Thermodynamic potentials are very useful when calculating the equilibrium results of a chemical reaction, or when measuring the properties of materials in a chemical reaction.
		The theory of thermodynamic potentials is not complete until we consider the number of particles in a system as a variable on par with the other extensive quantities such as volume and entropy.
		The definitions of the thermodynamic potentials may be differentiated and, along with the first and second law of thermodynamics, a set of differential equations known as the fundamental equations may be derived.
	en.wikipedia.org /wiki/Thermodynamic_potential (1902 words)

	First law of thermodynamics - Wikipedia, the free encyclopedia
		The first law of thermodynamics is an expression of the universal law of conservation of energy, and identifies heat transfer as a form of energy transfer.
		The increase in the internal energy of a thermodynamic system is equal to the amount of heat energy added to the system minus the work done by the system on the surroundings.
		In thermodynamics and engineering, it is natural to think of the system as a heat engine which does work on the surroundings, and to state that the total energy added by heating is equal to the sum of the increase in internal energy plus the work done by the system.
	www.yourproxy.eu /cgi-bin/nph-proxy.cgi/000110A/http/en.wikipedia.org/wiki/First_law_of_thermodynamics (1199 words)

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