Chapter 1️⃣5️⃣-1️⃣6️⃣ Flashcards

1
Q

Dynamic Equilibrium?

A

a balance between reactants and products

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2
Q

conditions of equilibrium

A

reaction must be reversible

system must be closed

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3
Q

Le Chatelier’s principle?

A

The equilibrium shifts to oppose any attempted change in conditions

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4
Q

inc temp?

A

shifts in the endothermic direction

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5
Q

inc pressure?

A

shifts to fewer gas mols side

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6
Q

equation for making Ammonia?

A

N2 + 3H2 = 2NH3

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7
Q

Effect of a catalyst?

A

Does not affect the position of equilibrium

Increases the rate of reaction

Iron catalyst used in the manufacture of NH3

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8
Q

What is the harber process?

A

Manufacture of ammonia from elements-nitrogen from the air and hydrogen from natural gas processing

Used to make fertilisers

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9
Q

Conditions for Haber process?

A

Temp-450oC

Pressure-200 atmospheres

Iron catalyst

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10
Q

How is the ammonia removed?

A

It is cooled and liquefied

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11
Q

What happens to the remaining Hydrogen and Nitrogen?

A

They are recycled promoting the formation of more ammonia

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12
Q

What does fertiliser do?

A

Promotes plant growth- producing bigger crops

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13
Q

How is fertiliser made?

A

The Ammonia is split. Some is oxidised to form nitric acid and then made into fertiliser

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14
Q

How many atmospheres are used to make sulfuric acid?

A

2- it gives a good enough yield (higher pressures involve cost)

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15
Q

Equation for sulfuric trioxide?

A

2SO2 + O2 = 2SO3

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16
Q

What temp is used for sulfuric acid?

A

450oC-

Low temp favours formation of SO3

Too slow is lower

17
Q

What catalyst is used in formation of sulfuric acid?

A

Vanadium Oxide

V2O5

18
Q

Chlorine uses?

A

Sterilising water

Making bleach

Making HCl

19
Q

Sodium Hydroxide uses?

A

Soap

Paper-treating pulp

Bleach

20
Q

Hydrogen uses?

A

Making margarine

Making Ammonia

As a fuel

21
Q

What is the Chlor-alkali industry?

A

Where salt is extracted from underground deposits by solution mining

The salt can be electrolysed to form sodium hydroxide, chlorine and hydrogen

22
Q

How does solution mining work?

A

Very hot water under pressure is pumped down into salt deposits

The salt dissolves and the solution can be electrolysed to produce three useful chemicals

The electrolysis can be carried out in a diaphragm cell

23
Q

What can Nitric acid be used for?

A

To make explosives