Kinetics/Equilibrium Review Question Preview (ID: 8715)


Kinetics/Equilibrium Review. TEACHERS: click here for quick copy question ID numbers.

2C(s) + H2(g) + 227.4 kJ <--> C2H2(g). If 682.2 kJ are absorbed, for how many moles of C2H2(g) are produced?
a) 3
b) 6
c) 2
d) 4

A student observed that the temperature of water increased when a salt was dissolved in it. The student should conclude that dissolving the salt caused
a) an endothermic reaction
b) an exothermic reaction
c) formation of an acidic colution
d) formation of a basic solution

Which change represents an increase in entropy?
a) Br2(s) --> Br2(g)
b) Br2(g) --> Br2(l)
c) H2O(g) --> H2O(l)
d) H2O(l) --> H2O(s)

N2(g) + 3H2(g) <--> 2NH3(g) + 92 kJ. A larger yield of NH3 is obtained when
a) temperature and pressure are decreased
b) temperature and pressure are increased
c) temperature is icreased and pressure is decreased
d) temperature is decreased and pressure is increased

The delta H of a chemical reaction refers to the change in
a) entropy
b) phase
c) activation energy
d) potential energy

H2(g) + I2(g) + heat <--> 2HI(g). What is the result of an increase in temperature
a) The equilibrium shifts to the left and concentration of H2 increases
b) The equilibrium shifts to the left and concentration of H2 decreases
c) The equilibrium shifts to the right and concentration of HI increases
d) The equilibrium shifts to the right and concentration of HI decreases

Which equilibrium system at constant temperature shifts to the right when pressure is increased
a) 2H2(g) + O2(g) <--> 2H2O(g)
b) 2SO3(g) <--> 2SO2(g) + O2(g)
c) 2NO(g) <--> N2(g) + O2(g)
d) 2CO2(g) <--> 2CO(g) + O2(g)

A(g) + B(g) <--> C(g) + D(g). At constant temperature and pressure, an increase in the concentration of A(g) causes
a) an increase in the concentration of B(g)
b) a decrease in the concentration of B(g)
c) a decrease in the concentration of C(g)
d) a decrease in the concentration of D(g)

Which phrase best describes the following reaction...2H2O(l) + heat <--> 2H2(g) + O2(g)
a) exothermic, releasing energy
b) exothermic, absorbing energy
c) endothermic, releasing energy
d) endothermic, absorbing energy

In most aqueous reactions as temperature increases, the effectiveness of collisions between reacting particles
a) decreases
b) increases
c) remains the same
d)

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