<p>Wait for the endothermic one does anyone remember if it was asking if asking for heat of the products or for energy?</p>
<p>I’m pretty sure it was energy.</p>
<p>Some endothermic reactions ARE spontaneous. Gibb’s Free Energy says that spontaneity equals enthalpy minus (entropy times temp). Consequently, you can have a spontaneous endothermic reaction if the reaction has a positive entropy and occurs at a high temperature</p>
<p>haha everyone says the same exact stuff. Just noone reads?</p>
<p>We’re asking whether the second part of the TTCE said if the products of an endothermic reaction have a higher energy or heat of products</p>
<p>It said products have a higher energy. The first part was false.</p>
<p>so…can anyone whos positive of their answer tlel me if the endothermic/spontaenous question was TTCE or TF? because personally i put TTCE…</p>
<p>I’m pretty sure the second part of the question said that in an endothermic reaction the products have a higher energy (not heat), and it was true</p>
<p>If it’s energy for the second part, then it’s FT.</p>
<p>Right, the answer is FT. The second part was definitely energy because I remember drawing the shape of an endothermic graph.</p>
<p>Anyone remember any of the math/stoichiometry/balancing questions?</p>
<p>I always make stupid mistakes on simple stuff.</p>
<p>The true/false was the hardest part and the balancing was pretty easy so don’t worry. None of them really required the H+/OH- ion method of balancing.</p>
<p>I just remembered a lot of limiting reactant questions.</p>
<p>what did u guys put for the hydrocarbon question
the first statement was: pure hydrocarbons have the same percent composition
second statement: all hydrocarbons are made up of the elements carbon and hydrogen only</p>
<p>We discussed this one already
false, true</p>
<p>FT is the correct answer. Pure hydrocarbons just mean that it is only carbon and hydrogen with no impurities or additional elements added onto the chain.</p>
<p>did the balancing equations have charges that needed to be balanced? hope i didnt miss those</p>
<p>no…
it can be alkanes, alkenes, alkynes, or those aromatic ring things</p>
<p>all with diff ratios
CH4 C2H4</p>
<p>Masterus, it wasn’t TTCE xD</p>
<p>Hydrocarbons can be Ethane, Ethene, or Ethyne</p>
<p>Different ratio of C:H, and thus different % composition.</p>
<p>Edit: Ballarinay, I didn’t see any charges, but I wasn’t paying attention very well.</p>
<p>I typed it wrong the first time. I realized that after I typed it.</p>
<p>statement 2 says ALL hydrocarbons. but aren’t there pure and impure hydrocarbons. the impure hydrocarbons don’t just have carbon and hydrogen elements.</p>