@CanisMajor you realize that le chat is only applicable to REVERSIBLE reactions right? This reaction isn’t reversible in the slightest. The lower partial pressure of oxygen at a higher altitude means its a lot less likely that oxygen will find its way to the cathode. This means CELL POTENTIAL (not mass, idk where you got that from) will decrease.
@Mochis1 I multiplied the number of moles, the change in temperature, and the molar heat capacity and then added the heat of fusion to get the answer for 7A
@CanisMajor: Ah, I see. I did that, too. Why did you add the heat of fusion, though? I might have forgotten to do that.
@mochis1 because you needed to find total energy needed, and that was part of that.
@skieurope who’s Trevor?
Edit: never mind
@michelle426: Wow I really was a mess that day. Another stupid mistake of mine. I’m really bound to fail this test now
This is why I was super confued for this question, I thought of Le Chat, but realized that it is only for equilibrium, and then had no idea what to do
@michelle426 In retrospect, i should not have used my explanations the way i did and so i sincerly hope for partial credit. Im pretty sure i got the right answers but used wrong explanation. btw there were two probs about increasing and decreasing. I said mass increases and cell potential decreases
Oh yeah, there were two different problems. I said mass stayed the same (which I bet is wrong) and that the cell potential decreases. My explanation to the answers might not be enough to get partial credit, though 
Ok I need to do super well on the MC…
@shiftydraw: Same. I had confidence in the FRQ, but now based on everyone’s helpful responses, it seems like I might not do as well as I expected…
Yeah, for me, I tried way too much to base it off standard problems, didn’t bother to notice q=mc t in different units, based explanations on problems that I had done before. But at the same time, it seemed like previous years FR didn’t have all these little things that got me. Oh well, just needa score high on the MC, which I didn’t find way too hard, very similar concepts to exams I practiced.
Basically in the same situation as you @shiftydraw 
Also, for the PV=nRT question I didn’t even notice they gave the vapor pressure of water (STUPID ME), so I got the wrong moles in 2ai. Since I had to use this number in 2b for percent yield, will I still get credit for using the wrong number?
And does 4s2 3d10 vs 3d10 4s2 matter? I did 4s2 3d10…
@Ninjadu: 4s23d10 is correct. If you reversed it, it would have been incorrect since 3d10 is larger than 4s2. And if you get a wrong number but correctly use it in the next problem, I believe you do get some credit.
@Mochis1 Either answer is correct…at least according to the textbook… They didn’t specify what order you had to put them in (i.e. if 4s2 or 3d10 came in first)
@Newdle: Ah, is that so? My bad then, that was just what my Honors/AP Chemistry teacher taught us. She said they were close in size, but to write them as 4s23d10. Thanks for pointing that out 
Oh okay, thanks for the clarification!
Uhh what do you mean by “some credit”? In my AP Chem class this year we always got full credit for carrying over the wrong answer into another problem and doing the other problem correctly, but I’m not sure how the FRQ graders will handle that…
Oh and do you guys think the PV=nRT question is worth 1 or 2 points? And how so divided?
@Ninjadu my teacher said they will calculate what you should’ve gotten with the wrong answer so your error should only punish you for 1 or 2 points. Not sure if that’s for certain but I think that’s also what they do for Calc
@nhnct21 Okay thanks! So to clarify, they most likely will only take off points on 2ai, but not subsequent questions like 2b if I plugged in the value correctly? That’s a relief