properties of hydrocarbons

Question 1

explain how the size of hydrocarbon molecules affects their boiling point, viscosity and flammability

Answer 1

As the hydrocarbon chain length increases, boiling point increases. As the hydrocarbon chain length increases, viscosity increases. As the hydrocarbon chain length increases, flammability decreases. hydrogen in the fuels are oxidised, releasing carbon dioxide, water and energy.

Question 2

explain how the property of a hydrocarbon affects its use as a fuel.

Answer 2

Hydrocarbon chains affect fuel properties such as boiling point, viscosity, and combustion energy

Question 3

describe what happens during the combustion of a hydrocarbons

Answer 3

During the combustion of hydrocarbons, the molecules react with oxygen, producing carbon dioxide, water, and energy in the form of heat and light. In complete combustion, hydrocarbons burn fully, resulting in carbon dioxide and water.

Question 4

write balanced equations for the complete combustion of hydrocarbon with a given formula

Answer 4

genralle formular
Cx Hy + O 2—>CO 2+H 2O

example: balanced equation for propane

C 3​H 8 ​+ 5O 2​→ 3CO 2​+4 H 2​O