Thermal Properties of Promethium and Praseodymium
Specific Heat
0.18 J/(kg K)
  
33
0.19 J/(kg K)
  
32
Molar Heat Capacity
Not Available
  
27.20 J/mol·K
  
18
Thermal Conductivity
17.90 W/m·K
  
99+
12.50 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.00 µm/(m·K)
  
99+
6.70 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
296.80 kJ/mol
  
29
Enthalpy of Fusion
7.50 kJ/mol
  
99+
6.89 kJ/mol
  
99+
Enthalpy of Atomization
310.00 kJ/mol
  
34
368.00 kJ/mol
  
24
Standard Molar Entropy
Not Available
  
73.20 J/mol.K
  
10