Thermal Properties of Ytterbium and Promethium
Specific Heat
0.15 J/(kg K)
  
36
0.18 J/(kg K)
  
33
Molar Heat Capacity
26.74 J/mol·K
  
25
Not Available
  
Thermal Conductivity
38.50 W/m·K
  
35
17.90 W/m·K
  
99+
Critical Temperature
Not Available
  
Thermal Expansion
26.30 µm/(m·K)
  
14
9.00 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
128.90 kJ/mol
  
99+
Not Available
  
Enthalpy of Fusion
7.66 kJ/mol
  
99+
7.50 kJ/mol
  
99+
Enthalpy of Atomization
180.00 kJ/mol
  
99+
310.00 kJ/mol
  
34
Standard Molar Entropy
59.90 J/mol.K
  
21
Not Available