Ch. 14 & 21 nuclear chem. & kinetics [90 points] AP Chemistry

For problems involving calculations, show your work in an organized manner, include any relevant formula / equation, the proper units in your work and answer, and the proper number of significant figures in your answer.

1. old topic: Describe and rationalize the trends in the 1 st ionization energy in a row of the periodic table (going from left to right), including the transition metals. [10 points]

 

2. In regards to the chemical reaction: CH 3OH + O -->  CO 2 + H 2O

if   { Δ CO2 / Δ time }= 10.0 mmoles / second, then [15 points]

a. the rate of the reaction is ____

 

b. {Δ CH3OH / Δ time }=

 

c. {Δ H2O / Δ time} =


3. In regards to the reaction: CH 3OH + O 2 -->  CO 2 + H 2O, the following hypothetical experimental data was obtained:

experiment

[CH 3OH] (M)

[O 2] (M)

Rate (M / s)

1

1.0

2.0

0.0128

2

4.0

2.0

0.0256

3

4.0

5.0

0.160

 

determine the rate law. [15 points]

 

4. Describe an experiment protocol, data to be collected, and data analysis to determine the activation energy of a reaction. [15 points]

 

5. Write the (hypothetical ?) nuclear reactions. [15 points]

a. 235Th undergoes alpha decay: ___________________________

b. 30Si undergoes beta (minus) decay: _________________________

c. 60Co undergoes positron emission: ____________________________

 

6. What is the difference, in terms of the type of nuclear reaction, between the hydrogen bomb versus the atomic bomb ? [5 points]

 

7. Determine the age of a sample that currently contains 10.0 µ Ci 14C, which originally contained 100. µ Ci 14C. The half-life of 14C is 5.73 * 10 3 years. Curie (Ci) is 3.7 * 10 10 disintegrations / second. [15 points]