Chemical Reactions Part 2

Question 1

How does Increase Temperature affect the equilibrium?

Answer 1

The system will try to decrease the temperature.
The ENDOTHERMIC reaction is favoured, the forward/reverse.
Equilibrium shifts to the right/left

Question 2

How does decreasing the temp affect?

Answer 2

System will try to increase the temp.
The forward/reverse reaction will be favoured which is EXOTHERMIC.
Equilibrium shifts to the right/left.

Question 3

How does increasing the pressure affect equilibrium

Answer 3

The system will try to decrease the pressure.
The equilibrium will shift to the side of fewer gas molecules.
The forward/reverse reaction will be favoured, thus moving to left

Question 4

How does decreasing the pressure affect the equilibrium

Answer 4

The system will try to increase the pressure.
The equilibrium will shift to the side of greater gas molecules.
The forward/reverse reaction will be favoured, thus moving to left/right

Question 5

How does increasing the concentration affect equilibrium? (Only gas and liquids)

Answer 5

The system will try to decrease the concentration.
The equilibrium will shift to the right/left
The forward/ reverse reaction will be favoured

Question 6

How does decreasing the concentration affect the equilibrium

Answer 6

The system will try to increase the concentration.
The equilibrium will shift to the right/left
The forward/ reverse reaction will be favoured

Question 7

Catalyst

Answer 7

Does not affect equilibrium.
Catalyst effects the rate at which equilibrium is reached

Question 8

Harber process

Answer 8

Manufacturing of ammonia

Question 9

Harber process

Answer 9

Manufacturing of ammonia

Question 10

Conditions of harber process

Answer 10

Iron catalyst
Temp at 450
Pressure at 200 atm

Question 11

Explain Iron catalyst

Answer 11

Speeds up the rate of reaction while lowering the activation energy

Question 12

Explain the Temperature for Harber process

Answer 12

Low enough to favour the exothermic reaction but high enough that it is economical at 450 C

Question 13

Explain pressure regarding the harber process

Answer 13

Needs to be high enough that the forward reaction is favoured but not too high as maintaining pressure is very close 200 atm

Question 14

Define contact process

Answer 14

The industrial manufacturing of Sulphuric acid

Question 15

STEP 1

Answer 15

The combustion of sulphur in air (oxidation)

Question 16

STEP 2

Answer 16

• Formation of sulphur trioxide
• reversible
• TEMP IS 450
• Pressure is 20 atm or 200 kPA
  -Vandium (V) Oxide catalyst

Question 17

STEP 3

Answer 17

• Sulphuric trioxide reacts with concentrated sulphuric acid to make Oleum

Question 18

STEP 4

Answer 18

Formation of Sulphuric acid:
- Oleum reacts with water