<p>Well the Delta H was positive so cooling the solution would have shifted equilibrium to the left and less solute would be in solution. So iii was false right?</p>
<p>was it endothermic or not for the condensation?</p>
<p>i put false for endothermic, but i forgot what the second part to that was (i think it was entropy?)</p>
<p>I remember iii saying that MORE solute would dissolve if you cooled it, so it was false.</p>
<p>Diatomic</p>
<p>Di-2
atomic-atom</p>
<p>so any molecule with 2 atoms is diatomic it dsnt have to be same element</p>
<p>“a. The diatomic molecule X2 is nonpolar
b. X2 has a linear molecular shape”</p>
<p>That was a CE. Because it is linear, the dipole moments cancel out and it is nonpolar.</p>
<p>@ harvard76. did it really say equilibrium?
i remember the question saying that once you dropped the solute in the solution… it ended up crystallizing meaning that the solution was already supersaturated.
did i misread the problem? what was it? haha</p>
<p>I’m pretty sure it was something like:
Condensation from a gas to a liquid is an endothermic process
b/c
Condensation leads to a decrease in entropy</p>
<p>So you got F,T right?</p>
<p>3 was false i think</p>
<p>I think we’re talking about two different problems, guys.</p>
<p>bytheway. would anybody like to confirm…</p>
<p>zinc is a better conductor than phosphorus.
solid cu in water is a good conductor of electricity.
ideal gas question for t/f? i forgot what it said already.
and there was a hydrogen taking in wavelengths question, forgot what that one said too.</p>
<p>@hffighter
I don’t believe it was a CE because the reason it is non-polar is because the atoms are the same, not necessarily because it is linear. It seems very ambiguous and open to interpretation though.</p>
<p>diatomic molecule one wasn’t ce
there are plenty of linear molecules that are polar</p>
<p>hydrogen energy packets was a ce wasn’t it?</p>
<p>@chemaster
Yeah, I said CE too.</p>
<p>ok for the diatomic it 100% wasnt a ce because there are many molecules that are linear and diatomic that are polar…but when it is x2…they are the same atom thus same electronegativies and nonpolar…therefore 1 and 2 are true but 2 is not why 1 is true</p>
<p>@Universal, chemaster
Not all linear molecules are nonpolar, but all diatomic molecules are nonpolar due to their linear structure, seeing as they are the same atom.</p>
<p>@chemaster…hydrogen one was a CE also</p>
<p>Even if all of the diatomics ARE linear and nonpolar, they aren’t nonpolar BECAUSE they are linear.</p>
<p>Actually, I can’t even think of a linear molecule that has polarity. Care to show me an example? I’m Googling it right now.</p>
<p>I got 3 T T CE’s: The HCl battery, the hydrogen absorbing light, and something else.</p>
<p>Diatomic was T T, no CE. Polar molecules must have polar bonds, regardless of shape. Diatomic molecules have no polar bonds.</p>
<p>For the KCl solution, I said that it was saturated (since adding more KCl makes it supersaturated and it crystallizes), though that may be wrong. III was definitely not true; Le Chatelier’s Principle doesn’t even apply since there’s no backwards reaction. There wasn’t a I and II only, so I picked I only (though II only may have been right).</p>
<p>For the NaCl solution and the lab equipment, I picked the buret, because a pipet only measures a specific amount of liquid. If we had a 10 mL pipet and needed 25 mL of solution, a buret would be more reliable. Again, I’m not 100% on this one either.</p>
<p>Just my two cents.</p>