Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A level Chemistry units 1 + 2 aqa > 1.6.1 & 1.6.2: Reversible Reaction and industrial processes > Flashcards

1.6.1 & 1.6.2: Reversible Reaction and industrial processes Flashcards

1
Q

As the reactants get used up…

A

The forward reaction slows down

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

As more product is formed…

A

The reverse reaction speeds ups

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

When it seems like nothing is happening…

A

the reaction is in dynamic equilibrium

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

Dynamic equilibrium

A

the concentrations of reactants and products stay constant

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

Closed system

A

nothing can get in or out

dynamic equilibrium occurs in a closed system

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

Le Chatelier’s principle

A

If a reaction at equilibrium is subjected to a change in concentration,pressure or temperature, the position of equilibrium will move to counteract the change.

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

Position of equilibrium moves to the left…

A

More reactants formed

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

position of equilibrium moves to the right…

A

More products formed

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

Homogeneous equilibria

A

Reactions where every species is in the same state

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

Conditions that affect equilibria

3

A

temperature
concentration
pressure

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

Increase in concentration of reactant or product

A

equilibrium shifts to the opposite side to remove the extra product or reactant

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

Pressure only affects substances in which state

A

equilibria involving gases

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

Increasing pressure

A

shifts equilibrium to the side with less gas molecules

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

Increasing the temperature

A

equilibrium shifts in the endothermic direction to absorb this heat

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

Decreasing the temperature

A

equilibrium shifts in the exothermic direction to produce more heat

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

If the forward reaction is endothermic…

A

the reverse reaction is exothermic

vice versa

17
Q

In industry the reaction conditions are…

A

a compromise

18
Q

Companies consider cost results in

A

compromise conditions

19
Q

Example of Compromise

A 
ethene and steam produce ethanol
65atm
300 degrees C
phosphoric acid catalyst
forward reaction = exo. 
lower temp favours exo but means low ROR 
so compromise temp.
high pressure = expensive equipment needed 
so compromise pressure

A level Chemistry units 1 + 2 aqa (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions