<p>Could someone give me a thorough explanation of this question?</p>
<p>Which combination of solutions of HCl and NaOH would
produce the largest ∆T?
(A) 50 mL of 1 M HCl with 50 mL of 1 M NaOH
(B) 50 mL of 2 M HCl with 50 mL of 2 M NaOH
(C) 100 mL of 1 M HCl with 50 mL of 2 M NaOH
(D) 100 mL of 1 M HCl with 100 mL of 1 M NaOH</p>
<p>Another question:</p>
<p>Reaction: 2NO(g) + O2(g) = 2NO2(g)
Which would increase the partial pressure of NO2(g) at
equilibrium?
(A) decreasing the volume of the system
(B) adding a noble gas to increase the pressure of the
system
(C) removing some NO(g) from the system
(D) adding an appropriate catalyst</p>
<p>Why is the answer A and not anything else?</p>
<p>Since pressure and volume are inversely related, then for pressure to increase, volume must decrease. Thats all I can think of so far.</p>
<p>^Thats what I said as well. (This was posted in another forum.) All the other answer choices would have no affect on the partial pressure of the NO2</p>
<p>As to the first question…</p>
<p>The answer is B. ∆T is equal to ∆Q/ (M * K). The second solution has the same change in energy as the fourth solution, because the more reactants reacts, the larger the change in energy. However, the second solution has less mass in the system; thus, the temperature of the system changes more.</p>