chem s3 u2 fuels Flashcards
1
Q
what is fuel?
A
fuels are chemicals that burn releasing heat energy
2
Q
reaction giving out energy?
A
exothermic
3
Q
reaction taking in energy?
A
endothermic
4
Q
what are fossil fuels made out of?
A
they were made
from the fossilised remains of animals and plants.
5
Q
what are fossil fuels?
A
coal oil gas
6
Q
what is burning or combustion?
A
a chemical reaction of a fuel with oxygen
7
Q
formation of coal
A
dead swamps and trees covered in sand with no oxygen
8
Q
formation of oil
A
dead microscopic organisms
