Ch 31 Flashcards

1
Q

The slowest step in a mechanism is called the

A

Rate-determining step

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the reaction rate?

A

The change of concentration of reactant or finished product with respect to time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A zero-order reaction has a constant rate which is

A

Independent of the reactants’ concentrations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A zero-order reaction has units of

A

Ms-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A first-order reaction has units of

A

s-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A second-order reaction has units of

A

M-1s-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the collision theory of chemical kinetics state?

A

The rate of a reaction is proportional to the number of collisions per second between reacting molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Reaction rates always increase with

A

Increasing temperatures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

An effective collision leads to the formation of products and only occurs if

A

Molecules collide with correct orientation and sufficient force or break and form new bonds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the Ae?

A

Minimum energy of collision needed for reaction to take place

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A transition state is formed when

A

Molecules collide with sufficient energy and in the correct orientation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The transition state has greater energy than the

A

Reactants or the products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A potential energy diagram illustrates the relationship between

A

AE, heats of reaction, and potential energy of the system before and after the reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A negative enthalpy change (-∆H) indicates an

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A positive enthalpy change (∆H) indicates an

A

Endothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

As reactant concentrations increase, all reaction rates increase except for

A

0 order