Chem 116 ASU Final Exam Review New!!

Chem 116 ASU Final Exam Review New!!
A catalyst accelerates a reac on because:



A.) it decreases the number of molecules with energy equal or greater than the ac va on
energy

B.) it lowers the ac va on energy for the reac on

C.) it increases the number or collisions between molecules

D.) it supplies energy to reactant Molecules. - CORRECT ANSWERS B.) it lowers the ac va on
energy for the reac on



Consider the Reac on:

8A(g) + 5B(g) --> 8C(g) + 6D (g)



If C is increasing at a rate of 4.0 M/s, at what rate is D changing?



A.) 4.9 M/s

B.) 3.0 M/s

C.) 2.0 M/s

D.) 6.0 M/s

E.) 4.0 M/s - CORRECT ANSWERS B.) 3.0 M/s



A good catalyst will speed p the forward reac on but not affect the speed of the reverse
reac on.



True or False? - CORRECT ANSWERS False

, H2(g) + MgC03 (s) <---> H20(g) + Co2(g)



what will happen to the amount of volume in the container?



A.) Amount of carbon dioxide present will increase

B.) Amount of carbon dioxide present will decrease

C.) the amount of carbon dioxide will be unchanged

D.) the equilibrium constant will have to decrease to compensate

E.) More info is needed - CORRECT ANSWERS A.) Amount of carbon dioxide present will
increase



2NaHCO3 (s) <---> Na2CO3(s) + H20(g) + Co2 (g)



what happens to the system when sodium carbonate is added?



A.) the concentra on of carbon dioxide will increase

B.) the concentra on of carbon dioxide will decrease

C.) the concentra on of carbon dioxide will be unchanged

D.) the amounts of all the products will be greater once equilibrium is rea=ained

E.) need more info - CORRECT ANSWERS C.) the concentra on of carbon dioxide will be
unchanged



3A(g) + 2B(g) --> 2C(g)



at 100 degrees celcius, a mixture of these gases at equilibrium showed that [A]=.855 M [B]=1.23
[c]=1.75 M. What is the value of Kc for this reac on? - CORRECT ANSWERS 3.24