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Kinetics/ Equilibrium 2
Test Description: Review of Kinetics/Equilibrium
Instructions: Answer all questions to get your test result.
1) A reaction occurs more slowly when a single piece of zinc is used than when the same mass of powdered zinc is used. Why does this occur?
A
The powdered zinc generates more heat energy
B
The powdered zinc has a greater surface area
C
The powdered zinc requires less activation energy
D
The powdered zinc is more concentrated
2) In order for a reaction to be spontaneous, the sign of delta G must be
A
negative
B
positive
C
zero
3) If a catalyst is added to a system at equilibrium, and the temperature and pressure remain constant, there will be no effect on the
A
activation energy of the reaction
B
rate of the forward reaction
C
rate of the reverse reaction
D
heat of the reaction
4) Assume that the potential energy of the products in a chemical reaction to be 60 kJ. This reaction would be exothermic if the potential energy of the reactants were
A
80 kJ
B
30 kJ
C
50 kJ
D
20 kJ
5) Which series of physical changes represents an entropy increase during each change?
A
solid --> liquid --> gas
B
liquid --> gas --> solid
C
solid --> gas --> solid
D
gas --> liquid --> solid
6) Which statement is true for a saturated solution?
A
It must be a concentrated solution
B
It must be a dilute solution
C
Neither dissolving nor crystallizing is occurring
D
The rate of dissolving equals the rate of crystallizing
7) PbCl2(s) <--> Pb2+(aq) + 2Cl-(aq). When KCl(s) is added to the system, the equilibrium shifts to the
A
left and the concentration of Pb2+(aq) ions decreases
B
left and the concentration of Pb2+(aq) ions increases
C
right and the concentration of Pb2+(aq) ions decreases
D
right and the concentration of Pb2+(aq) ions increases
8) The expression deltaH - TdeltaS is equal to the change in
A
activation energy
B
binding energy
C
free energy
D
ionization energy
9) What two criteria must be fulfilled in order for a reaction to occur
A
particles must collide with enough kinetic energy and proper orientation
B
particles must collide with enough potential energy and proper electronegativity
C
particles must collide with enough kinetic energy and proper electronegativity
D
particles must collide with enough potential energy and proper orientation
10) AgCl(s) <--> Aq+(aq) + Cl-(aq). As NaCl(s) is dissolved in the solution, the concentration of the Ag+ ions in the solution
A
decreases, and the concentration of the Cl-ions increases
B
increases, and the concentration of the Cl-ions increases
C
decreases, and the concentration of the Cl-ions remains the same
D
increases, and the concentration of the Cl-ions remains the same
*select an answer for all questions
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