|Number of pages / Number of words:||9 / 2294|
The other type of bonds are ionic, where a metal is involved. This is where electrons are transferred from one ion to another, so there is an electrostatic force between the ions.
The variables that must be controlled are:
* Mass of water
* Amount of wick on burner
* Type of alcohol
* Height of can above flame
* Type of can
* Time of burning
The alcohols used in this experiment will be from methanol, to hexanol, their formulas and predicted enthalpy changes are:
Substance Formula - Predicted enthalpy change (KJ/mole)
Methanol CH3OH -730
Ethanol C2H5OH -1370
Propanol C3H7OH -2010
Butanol C4H9OH -2670
Pentanol C5H11OH -3320
Hexanol C6H13OH 3980 N...
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The precicted enthalpy changes come form the book of data by Nufield science. As the table shows, each alcohol reaction increases each time by :
CH2 +11/2O 2 ? CO2 + H2O.
Investigating The Combustion Of Alcohols - Method
I did some preliminary results, the results of which are shown in the table below:
Mass water (g) Initial temperature (C) Final temperature (C) Temperature rise (C)
50 19 42 23
100 20 38 18
150 20 31 11
This experiment was done to see which mass of water would be best...
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