Combustion

Question 1

Alcohol can be used as a ____________

Answer 1

fuel

Question 2

What is methane?

Answer 2

a hydrocarbon

Question 3

state the combustion reaction of methane

Answer 3

methane + oxygen —–> carbon dioxide + water

Question 4

Meaning of combustion and what type of reaction it is?

Answer 4

burning,oxidation

CH(4)(g)+20(2)(g)——–>CO(2) + 2H(2)O(l)

Question 5

Explain what is meant by complete combustion

Answer 5

if all hydrocarbon is oxidised
only products are carbon dioxide and water
Only happens when plenty of oxygen available

Question 6

Name the test for carbon dioxide

Answer 6

lime water turns milky
carbon dioxide is bubbled thro lwater
carbon dioxide combines with lwater to form solid calcium carbonate
this makes lwater milky

Question 7

Explain what imcomplete combustion is

Answer 7

not enough oxygen 
hydrogen atoms become oxidised to water
carbon atoms may form 
carbon dioxide 
carbon monoxide 
soot

Question 8

Write methane incomplete combustion

Answer 8

methane + oxygen —>carbon dioxide + carbon monoxide+water

Question 9

Carbon monoxide disadvantages

Answer 9

toxic gas
reduces amount of oxygenthat blood carry around body
breathing it in can kill you

Question 10

Disadvantages of soot

Answer 10

build up in chimneys and cause fires
cause lung diseases
make buildings dirty