chemistry - combustion

Question 1

what is combustion?

Answer 1

Another word for burning. A fuel reacts with oxygen to release light and heat energy.

Question 2

what is a fuel?

Answer 2

A substance that burns to release energy

Question 3

give 3 examples of fuels

Answer 3

e.g alcohol, coal, wood, oil, natural gas, hydrogen, sugar

Question 4

Does hydrogen react well with oxygen?

Answer 4

yes! hydrogen is a fuel that reacts well with oxygen.

Question 5

Hydrogen + oxygen —-

Answer 5

—- water (H2O)

Question 6

what are hydrocarbons?

Answer 6

Hydrocarbons are fossil fuels because they are made up of molecules containing carbon and hydrogen.

Question 7

Hydrocarbons + Oxygen —–

Answer 7

—- carbon dioxide + water (fuel)

Question 8

what is oxidation?

Answer 8

oxidation is when a substance (metal / non-metal) reacts with oxygen to form an oxide.

Question 9

Iron + oxygen —-

Answer 9

—- iron oxide

Question 10

what is an exothermic reaction?

Answer 10

a chemical reaction which gives out heat energy. The heat increases in temperature.

Question 11

what are the 3 components in a fire triangle?

Answer 11

oxygen, fuel, heat

Question 12

what happens if there is not enough oxygen in the air?

Answer 12

carbon will undergo incomplete combustion

Question 13

when some of earths heat energy is trapped by greenhouse gasses what do you call this?

Answer 13

the greenhouse effect

Question 14

oxygen + fuel — (complete or incomplete combustion?)

Answer 14

incomplete combustion — carbon monoxide + water