Y11 Chemistry Topics 6 & 7 Memorising Stuff
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/32
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
33 Terms
What are the 8 main fractions obtained from crude oil?
Liquid petroleum gas, petrol, naphtha, paraffin, diesel, fuel oil, lubricating oil and bitumen
What is the boiling point of liquid petroleum gas?
<25°C
What is the average number of carbon atoms in liquid petroleum gas?
3
What is the boiling point range of petrol?
25–60°C
What is the average number of carbon atoms in petrol?
8
What is the boiling point range of naphtha?
60–180°C
What is the average number of carbon atoms in naphtha?
10
What is the boiling point range of paraffin?
180–220°C
What is the average number of carbon atoms in paraffin?
12
What is the boiling point range of diesel?
220–250°C
What is the average number of carbon atoms in diesel?
20
What is the boiling point range of fuel oil?
250–300°C
What is the average number of carbon atoms in fuel oil?
40
What is the boiling point range of lubricating oil?
300–350°C
What is the average number of carbon atoms in lubricating oil?
80
What is the boiling point of bitumen?
>350°C
What is the average number of carbon atoms in bitumen?
120
What are the main properties that change as hydrocarbon chain length increases?
Colour, ease of ignition and viscosity
What is the balanced equation for the Haber process?
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
What is the ΔH of the Haber reaction shown?
−92 kJ mol⁻¹
What temperature is used in the Haber process?
450°C
What pressure is used in the Haber process?
200 atmospheres
What is the first step of the Contact process?
Burning sulfur in excess air to produce sulfur dioxide
What is the equation for producing sulfur dioxide?
S(s) + O₂(g) → SO₂(g)
What is the equation for converting sulfur dioxide into sulfur trioxide?
2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
What is the ΔH for the formation of sulfur trioxide shown?
−196 kJ mol⁻¹
What temperature is used for the SO₂ → SO₃ stage of the Contact process?
400–450°C
What is SO₃ dissolved in during the Contact process?
Concentrated sulfuric acid
What is the product formed when SO₃ reacts with concentrated H₂SO₄?
Oleum
What is the formula of oleum?
H₂S₂O₇
What is the equation for forming oleum?
H₂SO₄ + SO₃ → H₂S₂O₇
What is the equation for converting oleum into sulfuric acid?
H₂S₂O₇ + H₂O → 2H₂SO₄
Why is SO₃ not added directly to water?
It produces a fog of sulfuric acid