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cycloalkanes have a higher boiling point than alkanes because there are more points of contact between the carbon-carbon chain, and thus more intermolecular Van Der Waal (or London) forces.
Similarly, the boiling point of alkanes increases as the length of the carbon chain increases. This is because more intermolecular forces are present, hence more energy in heat form is required to break the bonds. Branching in the alkanes reduces the boiling point as it reduces the points of contact.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoThere are a number of factors ( I am assuming the comparison is between CnH2n+2 and CnH2n+1X (X= halogen)
- haloalkanes are polar- and there will be dipole-dipole interactions not present in the non-polar alkanes
- haloalkanes have many more electrons than the corresponding alkane- so the london dispersion forces will be greater
- haloalkanes are heavier than their corresponding alkane (very minor effect)
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Why alcohol have higher boiling point than alkanes?
this is because of the presence of intermolecular hydrogen bonding in the polar molecules. energy is needed to over come the attractive forces resulting in higher boiling point values.
Which has higher boiling point aldehyde or ketone?
the alkanes are saturated and contains more atoms so therefore contain more electrons this results in stronger dispersion forces the alkenes and unsaturated contain less atoms less electrons weaker dispersion force compared to the alkane
What is the structural isomer of C8H18 with the lowest boiling point?
In organic chemistry, alkanes such as C8H18 have structural isomers. The more these isomers are branched the lower the boiling point is. The reason for this, is that un-branched alkanes have a higher mass area, they are more likely to have more potential points of attachments for other atoms or molecules which would then raise intramolecular forces thus increasing boiling points. The structural isomer of C8H18 that has the boiling point is systematically known as 2,2,3,3-tetramethylbutane.
Do long hydrocarbons have a higher boiling point then short hydrocarbons?
This is true as far as we are talking about alkanes. As the size of an alkane chain increases the boiling point increases because the relatively low van der Waals forces increase with mass. The higher the vdw forces the more energy required to break apart two molecules and thus higher boiling points.
Does chlorine or oxygen has higher boiling point?
Chlorine has higher boiling point.
Why alcohol have higher boiling point than alkanes?
this is because of the presence of intermolecular hydrogen bonding in the polar molecules. energy is needed to over come the attractive forces resulting in higher boiling point values.
Which has higher boiling point aldehyde or ketone?
the alkanes are saturated and contains more atoms so therefore contain more electrons this results in stronger dispersion forces the alkenes and unsaturated contain less atoms less electrons weaker dispersion force compared to the alkane
What is the structural isomer of C8H18 with the lowest boiling point?
In organic chemistry, alkanes such as C8H18 have structural isomers. The more these isomers are branched the lower the boiling point is. The reason for this, is that un-branched alkanes have a higher mass area, they are more likely to have more potential points of attachments for other atoms or molecules which would then raise intramolecular forces thus increasing boiling points. The structural isomer of C8H18 that has the boiling point is systematically known as 2,2,3,3-tetramethylbutane.
Do long hydrocarbons have a higher boiling point then short hydrocarbons?
This is true as far as we are talking about alkanes. As the size of an alkane chain increases the boiling point increases because the relatively low van der Waals forces increase with mass. The higher the vdw forces the more energy required to break apart two molecules and thus higher boiling points.
Why is acid anhydride having higher boiling point than alkane?
Molecules with dipoles have higher boiling points because they are able to form strong dipole-dipole interactions with other molecules. Alkanes are nonpolar and only have weak London dispersion forces, thus lower boiling points.
Does chlorine or oxygen has higher boiling point?
Chlorine has higher boiling point.
Why does isomerisation turn straight chain alkanes into alkanes with lower boiling temperature?
Isomerisation causes straight chain alkanes to become branched alkanes which prevents the chains from moving to close proximities of each other. This reduces the van der Waal's intermolecular forces between chains so less energy is needed to overcome the forces and thus a lower boiling point.
How does pressure affect boiling point?
The boiling point is that temperature when the SATURATEDvapor pressure of a liquidbecomes equal tothe surrounding pressure.Thus the higher the sorrounding pressure, the higher the boiling point.
How does salt effect boiling point?
The boiling point is higher.
Which substance has higher boiling point nitrogen fluoride or NH3?
Boiling point of NH3: -33,34 0C Boiling point of NF3: -129,1 0C The boiling point of ammonia is higher.
What happens if boiling point is higher than melting point?
The boiling point is always higher than the melting point.
Does chlorine have a higher boiling point than iodine?
iodine is having higher boiling point
