Are alkenes a homologous family?
Table of Contents
- Are alkenes a homologous family?
- Which alkanes are homologous?
- What is a homologous family?
- What are alkanes a family of?
- Why alkenes are not used as fuels?
- Why are alkanes not used as fuels?
- What are the first 10 alkynes?
- What are the first 10 alkenes?
- Which one is not a member of homologous series?
- What are two conditions needed for cracking?
- Why are alkanes a homologous series of hydrocarbons?
- How are alkanes and alkenes similar to each other?
- Which is an example of a homologous series?
- How are the atoms of an alkane molecule represented?
Are alkenes a homologous family?
The alkenes are a family which contain one carbon-to-carbon double bond. The alkenes are another example of a homologous series. The first member of the alkene family is ethene (shown below) since at least 2 carbons are needed to have a double carbon-to-carbon bond, the molecule methene does not exist.
Which alkanes are homologous?
The first member of the alkyne homologous group is ethyne whose formula is C2H2 and its structure is CH≡CH. The second member of the alkyne homologous group is propyne whose formula is C3H4 and its structure is CH3−C≡CH.
What is a homologous family?
A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula. We will look at three hydrocarbon series: alkanes, alkenes and the cycloalkanes. Hydrocarbons are compounds that contain only hydrogen and carbon.
What are alkanes a family of?
Alkanes The alkanes are a family of hydrocarbons and an example of a homologous series (a set of compounds which show similar chemical properties, a gradual change in physical properties and can be represented by a general formula). The alkanes • contain only single bonds • have the general formula CnH2n+2.
Why alkenes are not used as fuels?
Alkenes are not used as fuels because: They are scarce in nature. They are made from other hydrocarbons to make plastics, anti–freeze and many other useful compounds. They burn with a smoky flame due to less efficient, and more polluting incomplete combustion, so the heat energy release is lower than for alkanes.
Why are alkanes not used as fuels?
Alkanes can be burned, destroying the entire molecule, alkanes can react with some of the halogens, breaking carbon-hydrogen bonds, and alkanes can crack by breaking the carbon-carbon bonds. Because they combust with dioxygen to give carbon dioxide, and water with the RELEASE of energy….
What are the first 10 alkynes?
Here are the molecular formulas and names of the first ten carbon straight chain alkynes....Introduction.
| Name | Molecular Formula |
|---|---|
| Ethyne | C2H2 |
| Propyne | C3H4 |
| 1-Butyne | C4H6 |
| 1-Pentyne | C5H8 |
What are the first 10 alkenes?
List of Alkenes
- Ethene (C2H4)
- Propene (C3H6)
- Butene (C4H8)
- Pentene (C5H10)
- Hexene (C6H12)
- Heptene (C7H14)
- Octene (C8H16)
- Nonene (C9H18)
Which one is not a member of homologous series?
All are alkenes except 2-butyne. So, 2-butyne does not form the member of homologous series.
What are two conditions needed for cracking?
Thermal cracking uses harsh conditions like high temperature and high pressure. It breaks the alkanes into a high percentage of alkenes and comparatively few alkanes. Thermal cracking is done at about 1,000 degrees Celcius and 70 atm pressure.
Why are alkanes a homologous series of hydrocarbons?
The alkanes are a homologous series of hydrocarbons. This means that they have similar chemical properties to each other and they have trends in physical properties. For example, as the chain length increases, their boiling point increases.
How are alkanes and alkenes similar to each other?
Alkanes are useful as fuels and alkenes are used to make chemicals such as plastic. The alkanes are a homologous series of hydrocarbons. This means that they have similar chemical properties to each other and they have trends in physical properties. For example, as the chain length increases, their boiling point increases.
Which is an example of a homologous series?
The alkanes, alkenes and cycloalkanes are examples of homologous series. A homologous series is a group of chemicals which have similar chemical properties and can be represented by a general formula.
How are the atoms of an alkane molecule represented?
Alkane molecules can be represented by displayed formulae in which each atom is shown as its symbol (C or H) and the covalent bonds between them by a straight line. Notice that the molecular models on the right show that the bonds are not really at angles of 90°. Alkanes are saturated hydrocarbons.
