Essay On Alkanols
How does the length of carbon chains, specifically those related to alkanols, namely ethanol 1- propanol and 1- butanol, affect the heat of combustion?
To investigate how the length of carbon chains affect the heat of combustion and enthalpy, in order to determine which fuel would be the safest and most efficient to take on a camping trip.
HYPOTHESIS If the number of carbon atoms in an alkanol is increased, then the alkanol containing the longest carbon chain will have a higher heat of combustion, because as there are more carbon atoms, more energy will be released as a result of the breaking of the covalent bonding and the forming of bonding as the final product.
Fuels are hydrocarbons …show more content…
Alkanols consist of three levels known as primary, secondary and tertiary. Primary alkanols occur when the hydroxyl group bonds with the first carbon atom of the chain. Secondary alkanols form when the hydroxyl group bonds with the second carbon atom of the chain and tertiary alkanols occur when the hydroxyl group bonds with the third carbon atom of the chain. Both primary and secondary alkanols can be oxidized however tertiary alkanols cannot (ausetute, NA). As the number of Carbon atoms in the carbon chain increase, so does the boiling point of the fuel. Primary and secondary alkanols undergo complete combustion when burned in the presence of …show more content…
In order to determine this, 25 mL of each of the three fuels will be put into spirit burners. 80 mL of water will then be placed in a small conical flask atop a tripod. The initial temperature of the water and weight of the spirit burner will be recorded. The Spirit burner will be lit underneath the tripod, once left for 1 minute and 30 seconds, calculations will be used in order to calculate heat of combustion and enthalpy. In order to calculate the quantity of heat, the following formula will be used: Q= mC⩟T. Where Q equals the quantity of heat, m equals the mass of water, which is given as 4.18, and ⩟T is the change in temperature. Once this has been calculated, the enthalpy is calculated using the following formula: ⩟H = Q/nOnce these have been calculated, results will be recorded and the most efficient fuel will be determined, via the collected