MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Earn 100
A sketch of an energy level diagram that you think shows a very poor fuel.
Important Questions on Energy Changes, and Reversible Reactions
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
What else do you need to think about, to decide whether a substance would make good fuel?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Look at the table above. From all the information given, which of the three fuels do you think is best. Explain.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
The fuel Butane burns to give the same products as methane. Write a balanced equation for its combustion.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Can you get electricity from a non-redox reaction? Explain.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
In a simple cell, which metal gives up electrons to produce the current: the more reactive or less reactive?
HARD
Upper Secondary: IGCSE
IMPORTANT
A wire connects a strip of magnesium and copper, standing in an electrolyte. Bubbles appear on the copper strip. Why?
HARD
Upper Secondary: IGCSE
IMPORTANT
You connect two strips of iron using wire and stand them in an electrolyte. Will a current flow? Explain your answer.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
In a hydrogen fuel cell, what is the fuel? (Hydrogen and Water/ Hydrogen and Oxygen)
