Thermal Properties of Protactinium and Tantalum
Specific Heat
0.12 J/(kg K)
  
40
0.14 J/(kg K)
  
37
Molar Heat Capacity
Not Available
  
25.36 J/mol·K
  
99+
Thermal Conductivity
47.00 W/m·K
  
32
57.50 W/m·K
  
27
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.90 µm/(m·K)
  
40
6.30 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
753.10 kJ/mol
  
2
Enthalpy of Fusion
12.34 kJ/mol
  
28
31.40 kJ/mol
  
3
Enthalpy of Atomization
Not Available
  
782.00 kJ/mol
  
3
Standard Molar Entropy
198.10 J/mol.K
  
1
41.50 J/mol.K
  
37