SC12 - Reversible Reactions and Equilibria ✓ Flashcards

1
Q

SC12a - What is a reversible reaction?

A

A reaction where the products can react again to reform the reactants

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

SC12a - What symbol would show that a reaction is reversible?

A

⇌ : The double arrow

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

SC12a - In a reversible reaction how does the speed of the forward reaction and backward reaction change over time?

A
  • The forward reaction starts fast and gets slower over time.
  • The backward reaction starts slow and gets faster over time.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

SC12a - Define Dynamic Equilibrium

A

This is when the forward and backward reactions are occuring at the same rate, therefore the percentage of products and reactants remain the same

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

SC12a - What happens to the amount of products and reactants produced once a reaction has reached Dynamic Equilibrium?

A

They stop changing (increasing or decreasing)

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

SC12a - What is required for Dynamic Equilibrium to be achieved, and why?

A
  • A closed system.
  • In an open system fluids can escape and equilibrium cannot be reached
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

SC12a - What is the name and the chemical formula of the process that creates ammonia?

A
  • The Haber Process:
  • N2(g) + 3H2(g) ⇌ 2NH3(g)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

SC12a - What is the temperature, pressure and catalyst used during the Harber Process?

A
  • T: 450°
  • P: 200 Atmospheres (atm)
  • C: Iron Catalyst
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

SC12a - What happens to the position of equilibrium if you increase/decrease temperature?

A
  • Increase - shifts in the endothermic direction
  • Decrease - shifts in the exothermic direction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

SC12a - What happens to the position of equilibrium when you decrease/increase gas pressure?

A

Increase - shifts in the direction that formers fewer molecules (to reduce pressure)

Decrease - shifts in the direction the forms more gas molecules (to increase pressure)

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

SC12a - What happens to the position of equilibrium when you decrease/increase a concentration?

A
  • Increase - shifts in the direction that uses up the substance added
  • Decrease - shifts in the direction that forms more of the substance that was removed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly