Real gases have real volume Gas particles are not points of mass but have

Real gases have real volume gas particles are not

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Real gases have real volume. Gas particles are not points of mass, but have volumes determined by the sizes of their atoms and the bonds between them. Real gases do experience attractive and repulsive forces between their particles. Real gases deviate most from ideal behavior at low temperature and high pressure .
5-65 Figure 5.23 Deviations from ideal behavior with increasing external pressure.
5-66 Figure 5.24 The effect of interparticle attractions on measured gas pressure.
5-67 Figure 5.25 The effect of particle volume on measured gas volume.
5-68 The van der Waals equation The van der Waals equation adjusts the ideal gas law to take into account – the real volume of the gas particles and – the effect of interparticle attractions. ( P + n 2 a V 2 )( V ! nb ) = nRT Van der Waals equation for n moles of a real gas The constant a relates to factors that influence the attraction between particles. The constant b relates to particle volume.
5-69 0.034 0.211 1.35 2.32 4.19 0.244 1.39 1.36 6.49 2.25 1.45 3.59 4.17 5.46 He Ne Ar Kr Xe H 2 N 2 O 2 Cl 2 CH 4 CO CO 2 NH 3 H 2 O 0.0237 0.0171 0.0322 0.0398 0.0511 0.0266 0.0391 0.0318 0.0562 0.0428 0.0395 0.0427 0.0371 0.0305 Gas a atm·L 2 mol 2 b L mol Table 5.4 Van der Waals Constants for Some Common Gases

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