COMBUSTION AND CORROSION

Question 1

ENDOTHERMIC REACTION

Answer 1

A reaction that the system absorbs energy from its surroundings in the form of heat

Question 2

EXOTHERMIC REACTIONS

Answer 2

A reaction that releases evergy from the system in the form of heat

Question 3

COMBUSTION Reaction

Answer 3

Combustion happens when something reacts with oxygen (oxidation) causing it to burn or explode as it does so (i.e. bushfires)

Question 4

Fuel

Answer 4

Anything that burns is referred to as fuel.

Question 5

Complete combusion

Answer 5

Combustion reactions with an unlimited supply of oxygen
Clean reaction
produces carbon Dioxide- and water

Question 6

Incomplete combusion

Answer 6

Occurs when oxygen supply is limited or the oxygen cannot mix properly with the fuel
Incomplete combustion creates other reactions to occur as a result (i.e. smoke)
creates carbon monoxide, (dirty reaction)

Question 7

Role of combustion in climate change

Answer 7

Burning of gas, petrol, oil, coal and aviation fuel leads to the release of carbon dioxide into the atmosphere.
Incomplete combustion also releases carbon monoxide into the environment.

Question 8

Corrosion

Answer 8

when a metal is exposed to air, water and other chemicals, it is an exothermic reaction

Question 9

verdigiris

Answer 9

copper corrodes and it forms a green coating

Question 10

tarnish

Answer 10

pure silver reacts with sulfur to form a black coating