Alkenes

Chem

What are alkenes and why are they classified as unsaturated hydrocarbons?

Alkenes are unsaturated hydrocarbons because they each contain one carbon-carbon double bond.

Why are alkenes more reactive than alkanes?

The presence of the carbon-carbon double bond as their functional group makes alkenes more reactive than alkanes.

What do alkenes produce when they burn in air or oxygen?

Alkenes burn in air or oxygen to form carbon dioxide and water as steam.

What is the appearance of the flame when alkenes burn and why?

The flames are smoky yellow because alkenes have a higher ratio of carbon to hydrogen atoms, leading to unreacted carbon remaining.

What characterizes the combustion of alkenes?

The combustion of alkenes is exothermic.

What happens during addition reactions involving alkenes?

Alkenes react with other small molecules to form one molecule by breaking one bond in the double bond, resulting in a saturated compound.