Ok, i can see you're evidently having fun with this, but look up "chemical reaction" anywhere u like - it's the process of one or more substances acting on each other and being changed into something different. Elements combining to make new compounds. You can argue all u like, but gas being let out of a bottle is NOT a chemical reaction, it's a phase change.
The PROCESS of liquid turning into a gas is just that - a process.
The PROCESS of gas expanding is just that - a process.
There is no chemical reaction taking place in my fridge (except where the cheese is going mouldy), my air conditioner or when I open a can of coke.
The "action" of gas escaping at rapid pace is not part of a chemical reaction.
In Newtonian physics you might talk of that creating thrust and the equal & opposite reaction would push the bottle back, but that's a whole new branch of science, and we've gone off-topic enough already
Richard, you're a chemist... tell him!