Table 3. Thermodynamic Properties of Pure Hydrogen Obtained from the Empirical Equation of State for Hydrogen in REFPROP,92 and Different Hydrogen Force Fields: Hirschfelder,107 Vrabec,102 Buch,106 Cracknell97 and Marx99,a.
| (volumetric)
thermal expansivity αP (bar–1) | |||||||
|---|---|---|---|---|---|---|---|
| T (K) | P (bar) | REFPROP92,109 | Cracknell97 | Buch106 | Hirschfelder107 | Vrabec102 | Marx99 |
| 323.15 | 100 | 0.00297 | 0.003002(3) | 0.002984(4) | 0.003012(4) | 0.002938(2) | 0.003001(3) |
| 323.15 | 200 | 0.00283 | 0.002902(5) | 0.002868(5) | 0.002905(6) | 0.002790(3) | 0.002890(7) |
| 323.15 | 300 | 0.00270 | 0.002806(3) | 0.002747(5) | 0.002795(4) | 0.002650(3) | 0.002776(4) |
| 323.15 | 400 | 0.00256 | 0.002703(5) | 0.002630(2) | 0.002681(2) | 0.002523(3) | 0.002656(7) |
| 323.15 | 500 | 0.00244 | 0.002602(3) | 0.002517(2) | 0.002579(3) | 0.002408(3) | 0.002544(2) |
| 323.15 | 600 | 0.00233 | 0.002513(5) | 0.002411(3) | 0.002476(4) | 0.002300(4) | 0.002444(7) |
| 323.15 | 800 | 0.00213 | 0.002344(5) | 0.002222(3) | 0.002290(5) | 0.002116(4) | 0.002254(9) |
| 323.15 | 1000 | 0.001958 | 0.002193(5) | 0.002070(4) | 0.002131(3) | 0.001963(3) | 0.002093(4) |
| heat
capacity cP (J/(mol K)) | |||||||
|---|---|---|---|---|---|---|---|
| T (K) | P (bar) | REFPROP92,109 | Cracknell97 | Buch106 | Hirschfelder107 | Vrabec102 | Marx99 |
| 323.15 | 100 | 29.39 | 29.37(1) | 29.40(1) | 29.47(1) | 29.28(1) | 29.46(1) |
| 323.15 | 200 | 29.68 | 29.71(2) | 29.77(2) | 29.86(2) | 29.54(1) | 29.87(2) |
| 323.15 | 300 | 29.88 | 30.02(1) | 30.05(2) | 30.18(1) | 29.74(1) | 30.20(1) |
| 323.15 | 400 | 30.03 | 30.26(2) | 30.28(1) | 30.42(1) | 29.91(1) | 30.43(3) |
| 323.15 | 500 | 30.14 | 30.44(1) | 30.46(1) | 30.65(2) | 30.05(1) | 30.63(1) |
| 323.15 | 600 | 30.22 | 30.63(2) | 30.61(2) | 30.82(2) | 30.16(2) | 30.82(3) |
| 323.15 | 800 | 30.33 | 30.91(3) | 30.82(1) | 31.08(2) | 30.35(2) | 31.07(4) |
| 323.15 | 1000 | 30.392 | 31.11(3) | 31.03(3) | 31.28(2) | 30.49(2) | 31.27(2) |
| Joule–Thomson coefficient μJT (K/bar) | |||||||
|---|---|---|---|---|---|---|---|
| T (K) | P (bar) | REFPROP92,109 | Cracknell97 | Buch106 | Hirschfelder107 | Vrabec102 | Marx99 |
| 323.15 | 100 | –0.0384 | –0.02867(1) | –0.03443(1) | –0.02558(1) | –0.04933(1) | –0.02922(1) |
| 323.15 | 200 | –0.0424 | –0.03100(2) | –0.03685(2) | –0.03043(2) | –0.05057(1) | –0.03309(2) |
| 323.15 | 300 | –0.0454 | –0.03208(1) | –0.03926(2) | –0.03328(1) | –0.05182(1) | –0.03571(1) |
| 323.15 | 400 | –0.0474 | –0.03379(2) | –0.04099(1) | –0.03590(1) | –0.05240(1) | –0.03839(3) |
| 323.15 | 500 | –0.0489 | –0.03531(1) | –0.04255(1) | –0.03713(2) | –0.05267(1) | –0.04013(1) |
| 323.15 | 600 | –0.0500 | –0.03596(2) | –0.04368(2) | –0.03860(2) | –0.05307(2) | –0.04105(3) |
| 323.15 | 800 | –0.0512 | –0.03719(3) | –0.04516(1) | –0.04052(2) | –0.05310(2) | –0.04297(4) |
| 323.15 | 1000 | –0.05183 | –0.03811(3) | –0.04548(3) | –0.04155(2) | –0.05287(2) | –0.04393(2) |
a
Numbers in brackets indicate uncertainties in the last digit (95% confidence interval).