| 21. | The specific heats are particularly useful for thermodynamic calculations involving the ideal gas model.
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| 22. | Much later the ideal gas law was formulated in 1834.
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| 23. | Equipartition was used above to derive the classical ideal gas law from Newtonian mechanics.
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| 24. | The model of an ideal gas, however, does not describe or allow phase transitions.
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| 25. | Erwin Schr�dinger applied this to derive the thermodynamic properties of a semiclassical ideal gas.
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| 26. | Such systems are known as " ideal gas thermometers ".
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| 27. | This implies that the pressure of an ideal gas has a purely entropic origin.
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| 28. | Plugging in the radiation pressure, instead of the ideal gas pressure used above, yields
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| 29. | Thus, in an isothermal process the internal energy of an ideal gas is constant.
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| 30. | You could change the variables in the Ideal gas law.
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