Sage-Tips

Which hydrocarbon has high heat of combustion?

Ethane has the highest heat of combustion.

Why are hydrocarbons highly flammable?

Hydrocarbons are flammable because the carbon in their structure is in the most reduced form.

Why do longer chain hydrocarbons release more energy?

Since a longer carbon chain lengths contain more C-H and C-C bonds (more bond energies) which produce more C=O. and O-H bonds ( and ); more bonds would be needed to break and larger level of energy released.

Which hydrocarbon group is the least reactive Why?

Alkanes are the least reactive hydrocarbon groups. This is because they have single bonds and all the four electrons are always bound.

Which of the following has largest heat of combustion?

STATEMENT – 1 : Cyclopropane has the highest heat of combustion per methylene group.

What does the combustion of hydrocarbon fuels release?

Carbon and hydrogen atoms in the hydrocarbon fuel react with oxygen in an exothermic reaction: carbon dioxide and water are produced.

What is hydrocarbon combustion?

Hydrocarbon combustion refers to the chemical reaction where a hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat. Hydrocarbons are molecules consisting of both hydrogen and carbon. Energy is obtained from fossil fuels through combustion (burning) of the fuel.

Do larger hydrocarbons release more energy?

Fossil fuels are composed primarily of hydrocarbons (molecules containing primarily carbon hydrogen bonds). In these molecules carbon is in a very reduced state. Thus the greater the H/C ratio, the more energy release on combustion. Petroleum has a large saturated hydrocarbons content.

Why do hydrocarbons contain a lot of energy?

Hydrocarbons are organic molecules consisting entirely of carbon and hydrogen. They make good fuels because their covalent bonds store a large amount of energy, which is released when the molecules are burned (i.e., when they react with oxygen to form carbon dioxide and water).

Which of the following hydrocarbons is least reactive?

Hydrocarbons that have 4 bonds to every carbon atom are called alkanes. These are the least reactive of the hydrocarbons. Hydrocarbons that have a double bond between two carbon atoms are called alkenes.

Why are alkanes least reactive?

Alkanes are saturated and have stronger intermolecular forces of attraction. Thus, a lot of energy is needed to break their bonds. Therefore, they are less reactive.