## 2013/03/04

### Thermodynamics

The four rightfulnesss of thermodynamics define fundamental physical quantities (temperature, energy, and data) that characterize thermodynamic systems. The righteousnesss describe how these quantities behave under various circumstances, and forbid authorized phenomena (such as perpetual motion).
The four laws of thermodynamics are:[1][2][3][4][5][6]
Zeroth law of thermodynamics: If two systems are in thermal residuum with a third system, they must be in thermal rest with each other. This law helps define the notion of temperature.
First law of thermodynamics: Heat and work are forms of energy transfer. Energy is invariably conserved but the internal energy of a closed(a) system changes as heat and work are transferred in or out of it. Equivalently, perpetual motion machines of the first flesh are impossible.
Second law of thermodynamics: The entropy of any obscure system not in thermal equilibrium some always increases. Isolated systems spontaneously evolve towards thermal equilibriumâ€"the state of maximum entropy of the systemâ€"in a process known as thermalization. Equivalently, perpetual motion machines of the guerilla kind are impossible.
Third law of thermodynamics: The entropy of a system approaches a constant value as the temperature approaches zero.

The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the payoff of different ground states it has. Specifically, the entropy of a pure see-through substance at absolute zero temperature is zero.
Classical thermodynamics describes the switch of work and heat between systems. It has a special involvement in systems that are individually in states of thermodynamic equilibrium. thermodynamical equilibrium is a condition of systems which are adequately set forth by only macroscopic variables. Every physical system, however, when microscopically examined, shows apparently random microscopic statistical fluctuations in its thermodynamic variables of state (entropy, temperature,...If you want to get a full essay, regulate it on our website: Orderessay

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