Scan_Doc0094 - 186 Chapter Five Gases EXAMPLE 5 .3 22.6...

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Unformatted text preview: 186 Chapter Five Gases EXAMPLE 5 .3 22.6 22.5 22.4 '" d. 22.3 ;,.. C>.. 22.2 22.1 o 0.20 0.40 0.60 0.80 1.00 P (atrn) Figure 5.7 A plot of PV versus P for 1 mol of ammo- nia. The dashed line shows the extrapo- lation of the data to zero pressure to give the "ideal" value of PV of 22.41 L . atm. The fact that the volume decreases in Example 5.2 makes sense because the pressure was increased. To help eliminate errors, make it a habit to check whether an answer to a problem makes physical (common!) sense. We mentioned before that Boyle's law is only approximately true for real gases. To determine the significance of the deviations, studies of the effect of changing pressure on the volume of a gas are often done, as shown in Example 5.3. In a study to see how closely gaseous ammonia obeys Boyle's law, several volume mea- surements were made at various pressures, using 1.0 mol NH3 gas at a temperature of Oe. Using the results listed below, calculate the Boyle's law constant for NH3 at the...
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