《普通物理学》课程教学资源（参考资料）Some van der Waals Constants

Some van der waals Constants Pe 3.64×10-5 Carbon Dioxide(CO2) 3643 427×10 7.39 304.2 Nitrogen(N2) 1361 3.85×10 3.39 Hydrogen(H2) 265×105 30 5507 304×10-5 647.3 Ammonia(NH3) 4233 3.73×10 1128 Helium(He) 00341 234×10-5 0 Freon(CCl2F2) 1.078 9.98×1 4.12 385 a/(.m/mol2) b/(10 m/mol) 0.02476 0.02661 0.003456 0.02370 0.3639 0.04267 H20 0.5535 0.03049 0.1378 0.03l83 0.1408 0.0391 as Formula [(L2 atm)/mole? b [L/mole] Helium He 0.03412 0.02370 Hydrogen H2 0.2444 0.02661 Nitrogen N2 1.390 0.03913 ygen O2 1.360 0.03183 Carbon dioxide CO 3.592 0.04267 Acetylene 4.390 0.05136 Chlorine 6.493 0.05622 n-Butane CHIo 14.47 0.1226 n-Octane ChIS 37.32 0.2368 Atomic Molecular van der Waals van der Waal Element Radius Volume a constant ** b constant* Hydrogen 0.79 3.3 0.027 Helium 0.49 0.49 0.03 0.024 Neon 0.5 0.55 0.21 0.017

Some van der Waals Constants Substance a (J. m 3 /mole2 ) b (m3 /mole) Pc (MPa) Tc (K) Air .1358 3.64×10–5 3.77 133 Carbon Dioxide (CO2) .3643 4.27×10–5 7.39 304.2 Nitrogen (N2) .1361 3.85×10–5 3.39 126.2 Hydrogen (H2) .0247 2.65×10–5 1.30 33.2 Water (H2O) .5507 3.04×10–5 22.09 647.3 Ammonia (NH3) .4233 3.73×10–5 11.28 406 Helium (He) .00341 2.34×10–5 0.23 5.2 Freon (CCl2F2) 1.078 9.98×10–5 4.12 385 gas (Pa m mol ) 6 2 a  (10 m mol) 3 3 b H2 0.024 76 0.026 61 He 0.003 456 0.023 70 CO2 0.363 9 0.042 67 H2O 0.553 5 0.030 49 O2 0.137 8 0.031 83 N2 0.140 8 0.039 13 Gas Formula a [(L2 · atm)/mole2 ] b [L/mole] Helium He 0.03412 0.02370 Hydrogen H2 0.2444 0.02661 Nitrogen N2 1.390 0.03913 Oxygen O2 1.360 0.03183 Carbon dioxide CO2 3.592 0.04267 Acetylene C2H2 4.390 0.05136 Chlorine Cl2 6.493 0.05622 n - Butane C4H10 14.47 0.1226 n - Octane C8H18 37.32 0.2368 Element Atomic Radius Molecular Volume van der Waals a constant* van der Waals b constant* Hydrogen 0.79 3.3 0.24 0.027 Helium 0.49 0.49 0.03 0.024 Neon 0.51 0.55 0.21 0.017

Substance b Ar 134 0J 232 00398 00510 0.0266 N 139 00391 136 00318 00562 H C 2.25 0,0428