Burning carbon
A piece of pure carbon is burnt. This produces carbon dioxide.
The chemical equation for the reaction is: C(s) + O2(g) → CO2 (g)
1. Which are the products in this reaction?
2. Which are the reactants in this reaction?
3. Is this reaction reversible?
4. Is this a chemical or physical reaction?
5. How does the mass of C(s) compare with CO2 (g)?
a) The mass of C(s) is equal to the mass of CO2(g).
b) The mass of C(s) is greater than the mass of CO2(g).
c) The mass of C(s) is less than the mass of CO2(g).
A
The mass of C(s) is equal to the mass of CO2(g).
B
The mass of C(s) is greater than the mass of CO2(g).
C
The mass of C(s) is less than the mass of CO2(g).
Matches in space
Some students answer the question, “Can a match burn in space?”
Who do you agree with, and why?
Daniel: No, there is
no air to move the
fire along the match.
Nawaz: No,
because there is
no air in space.
Hannah: No, because there is
no oxygen in space.
Max: No,
because there is
no gravity in
outer space.
Oxygen need
Some magnesium is held using tongs in a Bunsen burner flame.
It burns with a bright white flame.
Never look directly at the flame.
What is the role of oxygen in this chemical reaction?
Read these statements.
For each statement, tick () one column to
show what you think about it.
A Oxygen is needed by the flame.
B Oxygen combines with the magnesium.
C The oxygen is burned by the flame.
I am
sure
this is
right
I
think
this is
right
I
think
this is
wrong
I am
sure
this is
wrong
Exhaust gases
A car contains 40kg of petrol.
It is driven until the petrol runs out.
What is the total mass of the exhaust gases produced during the
journey?
A
greater than 40kg.
B
equal to 40kg.
C
less than 40kg.
Y7 Starter
A piece of pure carbon is burnt. This produces carbon dioxide. The chemical equation for the
reaction is: C(s) + O2(g) → CO2 (g)
1. Which are the products in this reaction?
2. Which are the reactants in this reaction?
3. Is this reaction reversible?
4. Is this a chemical or physical reaction?
5. How does the mass of C(s) compare with CO2 (g)?
The mass of C(s) is _____________the mass of CO2(g).
(greater than/equal to/ less than)
6. A car contains 40kg of petrol. It is driven until the petrol runs out. What is the total mass
of the exhaust gases produced during the journey?
The total mass of the exhaust gases is ________than 40kg.
(greater than/equal to/ less than)