The following reaction is important in the

8) The following reaction is important in the manufacture of sulfuric acid.
SO
2
( g ) + 1/2 O
2
( g ) SO
3
( g
At 900 K, 0.0216 mol of SO
2
and 0.0148 mol of O
2
are sealed in a 1.00-L reaction
vessel. When equilibium is reached, the concentration of SO
3
is determined to be
0.0175 M . Calculate K
c
for this reaction.
)
A) 706 B) 3011 C) 55 D) 17.5 E) 6.66
9) The value of # H for a system at constant pressure that performs 13 kJ of
pressure-volume work on its surroundings and loses 9 kJ of heat is ______ kJ.
10) Which of the following statements is FALSE? 11) A cylinder of argon gas holds 20.0 L at a temperature of 25°C and a pressure of 18,000
torr. What volume would the argon from this cylinder occupy at STP?
12) 50.0 mL of 1.00 M sodium hydroxide is mixed with 50.0 mL of 1.00 M hydrochloric acid.
Each solution is initially at 25.0°C. After they are mixed, the temperature rises to 31.7°C.
What is the molar enthalpy change for the neutralization of hydrochloric acid by sodium
hydroxide? (Assume that the solution density is 1.0 g/mL and that the specific heat
capacity of the solution is identical to pure water.)
A) -2.8 kJ/mol
B) -28 kJ/mol
C) -56 kJ/mol
D) -5.6 kJ/mol
E) 28 kJ/mol
3

13) For which one of the following reactions is the value of # H°
rxn
equal to # H
f
° for the
product?
(g)
(s)
(g)
14) Consider the following reaction at equilibrium:
C (s) + H
2
O (g) CO (g) + H
Which of the following conditions will decrease the partial pressure of CO?
2
(g)