<p>What about the one that went “NO2(g) –> NO + O2+ heat” or something that asked what would happen if the system was placed in ice water. Choices were:</p>
<p>I. increase in pressure
II. increase in volume
III. decrease in concentration of NO2</p>
<p>What do you think the answer is??</p>
<p>lol…variance…you’ve asked this question so many times 
again…my answer was III only…i’m pretty confident about that…plus that guy in the thread who talked about it being such an easy question said III only too…so pretty certain.</p>
<p>I remember doing a few of these problems in the PR AP Chem exam workbook. I think the reasoning goes something like this…</p>
<p>The rxn is exothermic due to the “—> + heat” indication. Decreasing temperature favors the exothermic direction of the rxn, which is just the way it’s written currently. Since the products are favored, the reactant’s will decrease so the products can form.</p>