From the Amagat's curve we can see two types of result for real gases.
- If we increase pressure,the value of $PV$ decreases initially and then the value starts increasing for the gases like- carbon dioxide, nitrogen, oxygen, methane, etc..
- If we increase pressure,the value of $PV$ starts increasing initially for the gases like - hydrogen, helium, etc.
Now please explain what're the reasons behind this kinda behaviour of real gases?