Generally speaking, boiling points increase as carbon chain length increases. This is because there are more atoms present in the hydrocarbon molecule and therefore more intermolecular forces (eg Van der Waals') that must be overcome. In addition the now heavier molecule requires greater energy (heat) to make the phase change to a gas. However, branching decreases boiling point; branched hydrocarbons cannot pack together as closely as unbranched ones, and so intermolecular forces are less strong. So, for example, the bp is higher for butane than 2-methylpropane (even though they contain the same number of C and H atoms).
- A longer hydrocarbon chain means that there are more bonds to break, so more energy is needed in order for the boiling point to be reached. A shorter hydrocarbon chain is more flammable as it takes less energy to break the bonds between atoms.
Yes it does, as the carbon chain length INCREASES, its flammability DECREASES. This is because as the carbon chain length increases, the state changes from gas to liquid to solid.
We can also use the fractional distillation of crude oil as an example. Bitumen has a carbon chain length of approximately 35 or more. Bitumen is used to make roads, it can not be ignited easily otherwise all our roads will be on fire. Next, Gasoline has a carbon chain length of approximately 5 to 12. Gasoline one of the most commonly known flammable liquid. It ignites at around 232 degrees centigrade or 495 degree fahrenheit.
I hope it is useful.
A longer hydrocarbon chain means that there are more bonds to break, so more energy is needed in order for the boiling point to be reached. A shorter hydrocarbon chain is more flammable as it takes less energy to break the bonds between atoms.
The longer the chain the higher the boiling point.
The higher the viscosity the longer the chain.
the shorter the chain the easier it burns.
the longer it is the more lumpy it becomes
Longer carbon chain = higher boiling point.
it decreases as the molecules get higher
As atomic number increases, boiling point/K increases due to there being more electrons, which create a larger strength of negative charge around the nucleus of the atom. This affects the van der waals' forces (the forces of attraction between molecules or atoms), and they become stronger. With stronger forces, it requires more energy input to change the state of the element - resulting in a higher boiling/melting point. [:
The change in state from a solid directly to a gas is called sublimation. An example is frozen carbon dioxide which changes directly into gaseous carbon dioxide without going through a liquid phase.
Physical.
Any burning is a chemical change. When gasoline (mostly a hydrocarbon called octane) burns, or combusts, it reacts with oxygen in the air to produce water vapor, carbon dioxide, and a bunch of heat energy, which your lawn mower engine harnesses to do work (turn the blade.)
When the chain length of carbon increase the flammability decrease.
it decreases as the molecules get higher
The flammability DECREASES as the chain length increases. Methane (C1) is natural gas and by definition very flammable. C20 is basically paraffin wax and it will burn but with much greater difficulty.
Boiling is a physical phenomenon.
It increases.
It can NOT be changed by the presence of hydrogen without chemical reaction.
you have dr.whelan huh
Combustion clearly is a chemical change. In the combustion of a hydrocarbon, for example, you begin with the hydrocarbon and after combustion you end up with carbon dioxide (CO2) and water (H2O). This demonstrates that a chemical change has taken place.
The boiling points of noble gases increases down a group.
Most candles are made from a hydrocarbon called parafin; it burns, producing carbon dioxide and water vapor.
As the number of carbon-carbon double bonds increases, the melting point decreases.
Down the group generally boiling point increases. And this is true in the case of noble gases or group 18 also.