Notes, Exercises, Videos, Tests and Things to Remember on Some Hydrocarbons and Their Compounds
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It is found in swamps and marshy lands where it is produced by bacterial decomposition of complex vegetables and animal matters. It is also found in coalmines.
2.It is used in the manufacture of water gas (CO+H2) and hydrogen.
3.It is used for making 'carbon black' needed for paints and in rubber industries.
4.It is used for making printing ink.
5.It is used in the form of LPG in domestic use.
It occurs with methane in natural gas, coal gas, etc. It is also found in petroleum mines. It is slightly heavier than methane because its molecular weight is more than that of methane.
It is found in oil refinery gas, natural gas and LPG (Liquefied Petroleum Gas)
It occurs as natural gas and is found in petroleum mines.
The uses of methane are as follows:
Methane. Methane is the simplest alkane, consisting of a single carbon atom surrounded by 4 hydrogen atoms, giving it a chemical formula of CH4. It has a molecular mass of 16 and because of this low molecular mass, it exists as a gas at room temperature.
The prefix hep- means it has seven carbon atoms in the longest chain, and as heptane is a linear alkane (all the carbons in one chain, not branched off), so it must have 7 carbon atoms. The suffix, -ane, indicates that it is an alkane.
Complete combustion is where there are sufficient levels of oxygen present. Combustion of any hydrocarbon will produce carbon dioxide and water. Incomplete combustion is where not enough oxygen is present, forming carbon monoxide and water, or if there is a large lack of oxygen, carbon and water.
The first four alkanes are all gases (methane, ethane, propane and butane) at room temperature. The (straight chain) alkanes with a number of carbon atoms between 5 and 16 are liquids and solids begin to appear at C17H36. The trend in boiling points is because there is very little polarity in alkanes, so the only force holding the atoms together is Van de Waals forces which are very weak. The more points of contact, the more Van de Waals forces present in a molecule. This is why as a molecule gets larger, (hence more points of contact), it needs a higher temperature to reach its boiling point.
Molecular formula of methane: CH4
Structural formula of methane:
Molecular formula of ethane: C2H6
Structural formula of ethane:
The two uses of ethane are:
Symbolic function of carbooxylic group is ______.
The molecular formula of methane is ______
Methane is found in ______.
______ used in the manufacture of water gas(CO+H2).
C2H6 is molecular formula of _______.
The molecular formula of propane is ______.
The condensed formula of propane is ______.
CH3- CH2 - CH
CH3- CH2 - CH3
The molecular formula of butane is ______.