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Scan_Doc0095 - 5.2 The Gas Laws of Boyle Charles and...

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He 6 5 4 ~3 ;::.. 2 -: ~HP ~ H2 <~-;;::;: N 2 0 " ••• ........ ::::-.----- .... -300r-:;~~=IOO 0 100 200 300 -273°C TeC) Figure 5.8 Plots of V versus T (0G) for several gases. The solid lines represent experi- mental measurements of gases. The dashed lines represent extrapolation .of the data into regions where these gases would become liquids or solids. Note that the samples of the various gases contain different numbers of moles. Charles's law: V IX T (expressed in K)of constant pressure. EXAMPLE 5.4 Charles's law also can be written as !i = V 2 t, T2 5.2 The Gas Laws of Boyle, Charles, and Avogadro 187 He CH 4 6 5 4 ~3 ;::.. 2 Figure 5.9 Plots of V versus T as in Fig. 5.8, except here the Kelvin scale is used for temperature. 173 273 373 473 573 T(K) because the samples contain different numbers of moles of gas. A very interesting feature of these plots is that the volumes of all the gases extrapolate to zero at the same temper- ature, -273°C. On the Kelvin temperature scale this point is defined as 0 K, which leads to the following relationship between the Kelvin and Celsius scales: K = °C + 273 When the volumes of the gases shown in Fig. 5.8 are plotted versus temperature on the
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