Specific heat capacity of liquid form of permanent gases.

[AbhiNature]

Hi,

The permanent gases like Nitrogen, Helium etc. have more specific heat capacity as liquid than their gases. Seemingly degree of freedom should reduce in liquid form, and therefore, specific heat capacity must reduce in liquid form. But this isn't the case.

I remember reading somewhere that in liquid form some energy is stored as potential energy due to the vibrations of the molecules and therefore more specific heat capacity in liquid form.

Question - Why isn't this the case with liquid hydrogen? I looked up at the NIST site and every other permanent gas has more specific heat capacity than their gaseous form, but Hydrogen.

Thanks!

 

[Future Bruno]

</code>The difference in specific heat capacity between the gaseous and liquid forms of hydrogen is due to the fact that hydrogen has a relatively low boiling point compared to other permanent gases. The molecules of hydrogen can easily transition from a gas to a liquid and vice versa, making the potential energy of the molecule much lower than the other permanent gases. This lower potential energy translates into a lower specific heat capacity for hydrogen in the liquid form.