Re: What happen if i apply pressure to gases continuously?

The answer is very simnple.  It will stay as a gas.  Helium is probably 
the most difficult gas to compress to a liquid.  To liquify helium 
requires tremendous amounts of pressure and extremely cold temperatures. 
(Close to absolute zero).  As you probably know already, at absolute 
zero objects obtain a state of minimum energy.  At that point all
gases will finally solidify.

For a typical gas, as pressure increases, there will be a point, called 
the condensation point, when the gas will turn to a liquid and fall out.  
This occurs at different temperatures and pressures for all gases.  If you 
keep compressing the liquified gases, they will eventually solidify, but 
in the real world solidification is very difficult for some gases, such 
as helium, mentioned above.  The gas carbon dioxide does not go through 
a liquification point under normal conditions.  You have heard of dry 
ice?  That is frozen carbon dioxide.  If left to warm up, it will not go 
through a liquid state.  It takes special conditions to get liquid carbon 
dioxide.  

I hope this answers your question.

Carlin Gregory