Kinetics/ Equilibrium 2: Question Preview (ID: 13723)


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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 is more concentrated b) The powdered zinc has a greater surface area c) The powdered zinc requires less activation energy d) The powdered zinc generates more heat energy
In order for a reaction to be spontaneous, the sign of delta G must be
a) positive b) negative c) zero d)
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) rate of the forward reaction b) rate of the reverse reaction c) activation energy of the reaction d) heat of the reaction
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) 50 kJ b) 20 kJ c) 30 kJ d) 80 kJ
Which series of physical changes represents an entropy increase during each change?
a) gas --> liquid --> solid b) liquid --> gas --> solid c) solid --> gas --> solid d) solid --> liquid --> gas
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
PbCl2(s) <--> Pb2+(aq) + 2Cl-(aq). When KCl(s) is added to the system, the equilibrium shifts to the
a) right and the concentration of Pb2+(aq) ions decreases b) right and the concentration of Pb2+(aq) ions increases c) left and the concentration of Pb2+(aq) ions decreases d) left and the concentration of Pb2+(aq) ions increases
The expression deltaH - TdeltaS is equal to the change in
a) binding energy b) ionization energy c) free energy d) activation energy
What two criteria must be fulfilled in order for a reaction to occur
a) particles must collide with enough potential energy and proper electronegativity b) particles must collide with enough kinetic energy and proper orientation c) particles must collide with enough potential energy and proper orientation d) particles must collide with enough kinetic energy and proper electronegativity
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) decreases, and the concentration of the Cl-ions remains the same c) increases, and the concentration of the Cl-ions increases d) increases, and the concentration of the Cl-ions remains the same
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