1) Using the thermodynamic data below, determine the equilibrium constant

for the conversion of oxygen to ozone at 2,000 K.


Substance       (kJ/mol)       (kJ/mol)      S° (J/mol · K)
O2(g)                    0                       0                   205.0
O3(g)                142.3                163.4                237.6
                                   
Select one:
a. 2.67 × 10−8
b. 3.65 × 10−12
c. 2.91 × 10−9
d. 5.44 × 10−14
e. 2.04 × 107


2)
A solution of hydrochloric acid (HCl, 25.00 mL) was titrated to completion with 34.55 mL of 0.1020 M sodium hydroxide. What was the concentration of the hydrochloric acid?
Select one:
a. 0.0533 M
b. 0.2819 M
c. 0.0353 M
d. 0.07048 M
e. 0.1410 M


3)
A solution of hydrochloric acid (HCl, 25.00 mL) was titrated to completion with 34.55 mL of 0.1020 M sodium hydroxide. What was the concentration of the hydrochloric acid?
Select one:
a. 0.0533 M
b. 0.2819 M
c. 0.0353 M
d. 0.07048 M
e. 0.1410 M
4)
Oxidation refers to ________
Select one:
a. an increase in mass.
b. an increase in the atomic number.
c. a gain in the number of protons.
d. a decrease in oxidation number.
e. an increase in oxidation number.
5)
If the free-energy change of the following voltaic cell






is −46.3 kJ, what is the standard potential of the cell?
Select one:
a. −0.240 V
b. +0.240 V
c. +0.480 V
d. +0.080 V
e. −0.080 V
6)
What is the difference between ΔG and ΔG°?
Select one:
a. ΔG° refers to the formation of a compound from its elements; ΔG can be defined for any reaction.
b. ΔG° refers to reactions of one mole quantities of reactants; ΔG is defined for any quantity of reactants.
c. ΔG° refers to a reaction that goes to completion; ΔG is defined for a reaction that goes to any extent.
d. ΔG° refers to the conversion of reactants in their standard state to products in their standard state; ΔG is defined for a reaction under any conditions.
e. ΔG° refers to the formation of a pure compound; ΔG can be defined for an impure compound.
7)
What is the entropy change if 4.500 g of CaCO3(s) is placed in a container and allowed to decompose to CaO(s) and CO2(g) according to the following reaction?


                                                      
 
 
SubstanceS° (J/mol ⋅ K)CaCO3(s)       92.88CaO(s)       39.75CO2(g)      213.6  
Select one:
a. +35.7 J/K
b. −160.5 J/K
c. +7.2 J/K
d. +3.57 J/K
e. +160.5 J/K