Thermal Properties of Promethium and Rubidium
Specific Heat
0.18 J/(kg K)
  
33
0.36 J/(kg K)
  
17
Molar Heat Capacity
Not Available
  
31.06 J/mol·K
  
5
Thermal Conductivity
17.90 W/m·K
  
99+
58.20 W/m·K
  
26
Critical Temperature
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
90.00 µm/(m·K)
  
2
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
69.20 kJ/mol
  
99+
Enthalpy of Fusion
7.50 kJ/mol
  
99+
2.19 kJ/mol
  
99+
Enthalpy of Atomization
310.00 kJ/mol
  
34
82.00 kJ/mol
  
99+
Standard Molar Entropy
Not Available
  
76.80 J/mol.K
  
5