Thermal Properties of Promethium and Osmium
Specific Heat
0.18 J/(kg K)
  
33
0.13 J/(kg K)
  
39
Molar Heat Capacity
Not Available
  
24.70 J/mol·K
  
99+
Thermal Conductivity
17.90 W/m·K
  
99+
87.60 W/m·K
  
19
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
5.10 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
627.60 kJ/mol
  
7
Enthalpy of Fusion
7.50 kJ/mol
  
99+
29.30 kJ/mol
  
4
Enthalpy of Atomization
310.00 kJ/mol
  
34
669.00 kJ/mol
  
6
Standard Molar Entropy
Not Available
  
32.60 J/mol.K
  
99+