固态单质的热容(25 °C)

21 种固态单质在 298.15 K 的摩尔热容与比热,以及与杜隆–珀蒂值 3R 的比值;铜、银、金附有由低温热容积分得到的标准熵。

21 行
Li\ce{Li}—6.9424.633.5490.99—NIST-JANAF
Be\ce{Be}—9.0116.381.8180.66—NIST-JANAF
B\ce{B}—10.8111.221.0380.45—NIST-JANAF
C\ce{C}金刚石12.016.270.5220.25—Weber (Einstein 1907)
Na\ce{Na}—22.9928.151.2241.13—NIST-JANAF
Mg\ce{Mg}—24.3024.861.0231.00—NIST-JANAF
Al\ce{Al}—26.9824.210.8970.97—NIST-JANAF
Si\ce{Si}—28.0919.990.7120.80—NIST-JANAF
K\ce{K}—39.1029.560.7561.19—NIST-JANAF
Ca\ce{Ca}—40.0825.930.6471.04—NIST-JANAF
Ti\ce{Ti}—47.8725.240.5271.01—NIST-JANAF
Cr\ce{Cr}—52.0023.430.4510.94—NIST-JANAF
Fe\ce{Fe}—55.8425.100.4491.01—NIST-JANAF
Ni\ce{Ni}—58.6925.980.4431.04—NIST-JANAF
Cu\ce{Cu}—63.5524.440.3850.9833.15NSRDS-NBS 18
Zn\ce{Zn}—65.3825.390.3881.02—NIST-JANAF
Mo\ce{Mo}—95.9523.910.2490.96—NIST-JANAF
Ag\ce{Ag}—107.8725.350.2351.0242.56NSRDS-NBS 18
W\ce{W}—183.8424.310.1320.97—NIST-JANAF
Au\ce{Au}—196.9725.420.1291.0247.40NSRDS-NBS 18
Pb\ce{Pb}—207.2026.850.1301.08—NIST-JANAF

3R = 24.94 J K⁻¹ mol⁻¹。Cp 包含热膨胀的贡献,所以多数金属略高于 3R;铍、硼、碳(金刚石)、硅的振动在室温下尚未完全激发,明显偏低。

数据来源

  1. M. W. Chase, NIST-JANAF Thermochemical Tables, 4th ed., J. Phys. Chem. Ref. Data Monograph 9 (1998): Shomate fits for the solids, evaluated at 298.15 K (via the NIST Chemistry WebBook).
  2. G. T. Furukawa, W. G. Saba, M. L. Reilly, NSRDS-NBS 18 (1968): copper, silver and gold, Tables 2, 4 and 6.
  3. A. Einstein, Ann. Phys. 22, 180–190 (1907), p. 190: H. F. Weber’s diamond data, interpolated to 298.15 K.

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