The gas laws

Pressure law

Pressure law The pressure of a fixed mass of gas at constant volume is proportional to its thermodynamic temperature.  The relation between Summarizing the gas laws dealt with in this chapter we have pressure, volume and thermodynamic temperature pV = constant (Boyle’s law) TV = r constant (Charles’s law) Tp’= V constant (Pressure law) These three equations …

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Other ways of expressing Charles’s law and the Pressure law

Other ways of expressing Charles’s law and the Pressure law If we assume that the two graphs in Figs. 16.8 and 16.9 have been plotted using Celsius and thermodynamic temperatures then we can use them to express Charles’s law and the Pressure law in a form which is usually more convenient for calculation purposes than the …

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The absolute or thermodynamic scale of temperature

The absolute or thermodynamic scale of temperature If volume-temperature and pressure-temperature graphs for a gas are plotted on extra large sheets of graph paper and then produced or extrapolated backwards they cut the temperature axis at – 273°C (Fig. 16.8 and 16.9). This suggested to the early experimenters that – 273°C might be the lowest temperature attainable …

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