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introthermo - Introduction to Thermodynamics Temperature...

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Introduction to Thermodynamics; Temperature and Its Effects; Ideal Gas Law Introduction to thermodynamics The standard model in thermodynamics is a cylinder with a piston and an ideal gas inside. Thermodynamics divides the world into a system (e.g. the ideal gas) plus its environment. The system is described by specifying the value of state variables (temperature T, pressure P, volume V, and number of moles n) and realizing that in equilibrium these variables are fixed. In equilibrium there are state functions (internal energy E int and entropy S) that also do not change with time. Various thermodynamic processes cause a change in the state variables and state functions but for state functions only the beginning and ending state are important, i.e. the change in state function is path independent . Thermodynamic processes generally involve energy transfer, either by doing work (W) on the system or by heating the system (Q).
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