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 ₂  -->  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]