Le Chatelier's Principle Flashcards

1
Q

What does Le Chatelier’s principle state?

A

If there’s a change in temperature, pressure or concentration in a reversible reaction, the equilibrium position will move to help counteract that change.

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

All reactions are what and what in each direction?

A

Exothermic in one direction, and endothermic in the other.

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

What will happen if you decrease the temperature?

A

The equilibrium will move in the exothermic direction to produce more heat.

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

What will happen if you increase the temperature?

A

The equilibrium will move in the endothermic direction to absorb the extra heat.

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

Changing pressure only affects what state?

A

Gases.

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

What will happen if you increase the pressure?

A

The equilibrium will move towards the side that has fewer moles of gas to reduce pressure.

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

What will happen if you decrease the pressure?

A

The equilibrium will move towards the side that has more moles of gas to increase pressure.

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

What will happen if you increase the concentration of the reactants?

A

The equilibrium will move to the right to use up the reactants (making more products).

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

What will happen if you decrease the concentration of the reactants?

A

The equilibrium will move to the left to use the products (making more reactants).

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

What will happen if you increase the concentration of the products?

A

The equilibrium will move to the left to use up the products (making more reactants).

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

What will happen if you decrease the concentration of the products?

A

The equilibrium will move to the right to use up the reactants (making more products).

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

How does temperature affect the Haber process?

A

N2 + 3H2 ⇌ 2NH3

This reaction is exothermic in the forward direction. If you decrease the temperature, the equilibrium will shift to the right (so you’ll make more products).

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

How does pressure affect the Haber process?

A

N2 + 3H2 ⇌ 2NH3

This reaction has 4 moles of gas on the left, and 2 on the right. If you increase the pressure, the equilibrium will shift to the right (so you’ll make more product).

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

How does concentration affect the Haber process?

A

N2 + 3H2 ⇌ 2NH3

If you increase the concentration of N2 or H2, the equilibrium will shift to the right to use up the extra reactants (so you’ll make more products).

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