Thermal Properties of Promethium and Hafnium
Specific Heat
0.18 J/(kg K)
  
33
0.14 J/(kg K)
  
37
Molar Heat Capacity
Not Available
  
25.73 J/mol·K
  
36
Thermal Conductivity
17.90 W/m·K
  
99+
23.00 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
5.90 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
661.10 kJ/mol
  
5
Enthalpy of Fusion
7.50 kJ/mol
  
99+
25.10 kJ/mol
  
8
Enthalpy of Atomization
310.00 kJ/mol
  
34
703.00 kJ/mol
  
5
Standard Molar Entropy
Not Available
  
43.60 J/mol.K
  
34