Thermal Properties of Promethium and Rhenium
Specific Heat
0.18 J/(kg K)
  
33
0.13 J/(kg K)
  
39
Molar Heat Capacity
Not Available
  
25.48 J/mol·K
  
38
Thermal Conductivity
17.90 W/m·K
  
99+
48.00 W/m·K
  
31
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
6.20 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
707.10 kJ/mol
  
3
Enthalpy of Fusion
7.50 kJ/mol
  
99+
33.05 kJ/mol
  
2
Enthalpy of Atomization
310.00 kJ/mol
  
34
791.00 kJ/mol
  
2
Standard Molar Entropy
Not Available
  
36.90 J/mol.K
  
99+