Why can't N2 gas outperform H2 gas in energy generation? A quick note

H2 gas has been identified as a critical solution for producing clean energy. It is currently the most hyped commodity on the market. True, it has exceptional thermodynamic properties that no other gas can match.

On the left side graph, you would see, that both N2 and H2 have the same Z values at high pressure. That means in terms of compressibility both are near equal. Then question what is wrong with N2?

Now, look at the right-side table both N2 and H2 have the same Cp/Cv 1.4. Both are diatomic gases. Both have DOF=5, y = 1 + 2/DOF = 1+0.4 = 1.4.

Even here N2 looks comparable to H2.

Again question, what is wrong with N2?

Now, go further deeper, and look at Cp, Cv, Cp/Cv data. You will be surprised and perhaps confused, how when both have the same y they have so different Cv. 0.7 for N2 and about 10 for H2. That is H2 has 14 times more Cv than N2

Ask the question why?

The answer, N2 is 14 times heavier than H2. Therefore, H2 has 14 times more particles where it stores energy in 1-mole gas. This makes H2 a huge storage silo for internal energy.

No gas can beat H2 just for its unique atomic structure and smallest mass.