Each molecule is on its own. There is nothing to dissolve. No bonds to break.

We are talking about mixing of gases, not the solution of a liquid in a gas or a solid in a liquid.

Here, no bonding forces are broken as there are almost none active. Air as a mixture of gases at low pressure is, at least like I have learned in thermodynamics, treated as if its different components don’t interact with each other. For each component, the state equation is evaluated individually using its partial pressure.