Chapter 6 Review Assignment
Name:
1-Butene (CH3CH2CH=CH2 ) undergoes an exothermic addition reaction with H2, with the
help of a Ni(s) catalyst.
1.
Draw the product(s) of the addition reaction.
2.
What is the sign of H for this reaction?
3.
Looking at the reaction, what is the expected sign of S?
4.
Is the reaction going towards order or disorder?
5.
Which has lower energy, order or disorder?
6.
In determining G, which is usually the more important term: H or S?
7.
What is G called?
8.
For this reaction is G positive or negative?
9.
Is it spontaneous in the forward direction?
10.
Is K greater than 1 or less than 1?
11.
So, at equilibrium is there more product or reactant?
12.
Is Ni(s) a homogeneous or heterogeneous catalyst?
13.
What does a catalyst do to the reaction rate? How does it do it?
14.
What happens to the catalyst by the end of the reaction mechanism?
15.
How does a catalyst affect the position of the equilibrium?
16.
Assuming the first step of the mechanism for the uncatalyzed reaction is the slow step
and involves CH3CH2CH=CH2 and H2 in a 1:1 ratio, what is the rate law for the reaction?
17.
Draw the PE vs.Reaction Progress diagram for the uncatalyzed reaction and label Ea, H,
and the transition state.
18.
If kforward and kreverse were known, could K be calculated? How?
19.
If kforward and kreverse were known, could G be calculated? How?
20.
If K were known, could the rate of the reaction be calculated? How?
21.
What is the relationship between addition reactions and elimination reactions?
22.
How does homolytic cleavage differ from heterolytic cleavage?
23.
What is a carbocation? What is a carbanion?