Thermal Properties of Promethium and Gallium
Specific Heat
0.18 J/(kg K)
  
33
0.37 J/(kg K)
  
16
Molar Heat Capacity
Not Available
  
25.86 J/mol·K
  
35
Thermal Conductivity
17.90 W/m·K
  
99+
40.60 W/m·K
  
34
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
18.00 µm/(m·K)
  
24
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
256.10 kJ/mol
  
36
Enthalpy of Fusion
7.50 kJ/mol
  
99+
5.59 kJ/mol
  
99+
Enthalpy of Atomization
310.00 kJ/mol
  
34
276.10 kJ/mol
  
39
Standard Molar Entropy
Not Available
  
40.80 J/mol.K
  
38