Thermal Properties of Yttrium and Promethium
Specific Heat
0.30 J/(kg K)
  
18
0.18 J/(kg K)
  
33
Molar Heat Capacity
26.53 J/mol·K
  
27
Not Available
  
Thermal Conductivity
17.20 W/m·K
  
99+
17.90 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
10.60 µm/(m·K)
  
37
9.00 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
393.00 kJ/mol
  
18
Not Available
  
Enthalpy of Fusion
17.15 kJ/mol
  
16
7.50 kJ/mol
  
99+
Enthalpy of Atomization
418.00 kJ/mol
  
18
310.00 kJ/mol
  
34
Standard Molar Entropy
44.40 J/mol.K
  
33
Not Available