<p>Hey, I got a question for those of you studying for the AP Chem exam.</p>
<p>How do you tell if a gas(compound or element) is non-ideal or ideal?</p>
<p>There are several questions like that on past exams.</p>
<p>All gases are not ideal. </p>
<p>An ideal gas:
-its molecules have no mass
-its molecules take up no volume
-its collisions are perfectly elastic (total KE conserved)
-there’s no IMF’s whatsoever amongst the molecules of an ideal gas.</p>
<p>In short, all “real gases” can never be ideal.</p>
<p>But how do you tell which one is MOST non-ideal?</p>
<p>Larger molecules with greater IMFs tend to be more non-ideal.</p>
<p>What does IMF stand for?</p>
<p>intermolecular forces</p>
<p>this helps a lot…thanks</p>
<p>a good idea is just. the less sh** going on. the better.</p>
<p>^ lol. what a simple way to put it</p>