chemical thermodynamics of neptunium and plutonium - U.S. ...

46 3. Selected neptunium dataTable 3.1: (continued)Compound f G ◦ m f Hm ◦ Sm ◦ Cp,m◦(kJ · mol −1 ) (kJ · mol −1 ) (J · K −1 · mol −1 ) (J · K −1 · mol −1 )Rb 2 Np 2 O 7 (cr) −2914.000±12.000Cs 2 NpO 4 (cr) −1788.100±5.700Cs 2 NpCl 6 (cr) −1833.039 (a) −1976.200 410.000±4.871 ±1.900 ±15.000Cs 2 NpO 2 Cl 4 (cr) −2056.100±5.400Cs 3 NpO 2 Cl 4 (cr) −2449.100±4.800Cs 2 NpBr 6 (cr) −1620.121 (a) −1682.300 469.000±3.616 ±2.000 ±10.000Cs 2 NaNpCl 6 (cr) −2217.200±3.100(a) Value calculated internally with the Gibbs-Helmholtz equation, f G ◦ m = f H ◦ m −T ∑ i S◦ m,i .(b) Value calculated internally from reaction data (see Table 3.2).(c) Temperature coefficients of this function are listed in Table 3.3.(d) A temperature function for the heat capacity is given in Table 3.3.