<p>oh nde thanks, i meant to ask how many TT CEs there were total in the whole section</p>
<p>@cribelle: i got 3 TT CE not sure about that one, that part was a pain in the ass</p>
<p>On the second column of the T/F I had like all Trues for the first statements (maybe 1-2 false). Also I think I had around 2-3 total T/T/CE although I skipped one.</p>
<p>hmm for the acetic acid one i got sodium bicarbonate cuz sodium bicarb releases CO2 when its mixed with hydrogen ions rite… X_X</p>
<p>That is correct.
CH3COOH + NaHCO3---->H2CO3+NaC2H3O2->H20+CO2+NaC2H302</p>
<p>the last T/F question about heat of formation is FF?
(Heat of formation is dependent on temperature (F) BECAUSE Hrxn is dependent on reaction rate (F) )</p>
<p>the last T/F question about heat of formation is FF?
(Heat of formation is dependent on temperature (F) BECAUSE Hrxn is dependent on reaction rate (F) )</p>
<p>Agreed</p>
<p>^agreed FF</p>
<p>what about the one with vapor pressure “adding something to water boiling point goes up BECAUSE vapor pressure is raised” is it TF</p>
<p>^ agreed, the vapor pressure would go down (definition of boiling point is when solutions vapor pressure equals atmosphere)</p>
<p>for the matching section in the beginning was Fe used twice? once for the transition metal and the second time for the element with 4 unpaired electrons.</p>
<p>does N have 3 unpaired electrons?</p>
<p>anyone get the boiling point question? it was something along the lines of: what is happening to the molecules when the water reaches its boiling point:</p>
<p>rate of effusion = diffusion (…?)
rate of condensation = vaporisation (don’t think its this one bc isn’t that evaporation?)
something else
critical temperature</p>
<p>for the matching section in the beginning was Fe used twice? once for the transition metal and the second time for the element with 4 unpaired electrons.</p>
<p>Yes, but I unfortunately left one blank of those two – just couldn’t figure it out…so annoying</p>
<p>for the matching section in the beginning was Fe used twice? once for the transition metal and the second time for the element with 4 unpaired electrons.</p>
<p>does N have 3 unpaired electrons? </p>
<p>– agree both.</p>
<p>One graphing question with the phase changes : the heat of evaporation is greater than the heat of fusion</p>
<p>I agree, the heat of evaporation is greater than the heat of fusion</p>
<p>so which one was an endothermic reactions: freezing or evaporation?</p>
<p>^i agree with the heat of evaporation vs heat of fusion problem</p>
<p>i think the answer for the endothermic question was evaporation/vaporization (don’t remember wat the actual word was)</p>
<p>@nde: yea, i got stuck on that question for the longest time, electron configurations are annoying as hell lol</p>
<p>It was </p>
<p>blank freezing
and
blank vaporizing
something like that, uk?</p>
<p>I’m thinking it’s vaporizing (seems like if water froze it’d give off heat and be exothermic)</p>
<p>Also, random thing I remember: the one that didn’t go through a phase change was D according to the graph</p>
<p>Freezing is an exothermic process (not reaction); when the particles of a liquid condense the system of particles lose energy, which is released as heat. Just imagine the particles of water with a lot of translational energy –> now a solid with only vibrational energy.</p>
<p>Therefore the answer has to be vaporization. I’m not sure what the other choices were though. Hope i explained it clearly.</p>
<p>what was the question under the indicator color change (pink) question?</p>
<p>When a solution is boiling, its vapor pressure matches its atmospheric pressure- it was worded awkwardly but there was one choice (B- I believe?) that was along these lines.</p>
<p>PS I put evaporation as endothermic.</p>
<p>PSS adding something to solution to raise its boiling point is because the solute brings the vapor pressure down, right? So in order for it to match the atmospheric pressure to boil, it requires a higher temperature. I put F, F for that one.</p>
<p>It was the pheosomething paper that turns pink</p>
<p>and to the PSS: i don’t remember what the two parts were, so I can’t say for sure if it was FF, but what you wrote about the boiling point stuff is all right.</p>
<p>When a solution is boiling, its vapor pressure matches its atmospheric pressure- it was worded awkwardly but there was one choice (B- I believe?) that was along these lines.</p>
<p>What was the Question for that?</p>
<p>@nde: yea i got pink for pheow/e also but i was just wondering what the question under that one was? it was also a color question i believe</p>