Combustion of Alcohols
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The trend in the number of bonds and the change in mass
The higher the number of bonds the less mass change, this is due to all tests having the same amount of time spent being burnt, and due to more bonds more energy must be used to break them, this reduces the mass less as there are more bonds
The way that the experiment can be repeated
is by using a ruler to keep the same measurements
The use of a draft screen
So as much energy is transferred to a copper container
Safety precautions
remove highly flammable materials Wear goggles for your eyes
variables that must be controlled
the timing of which the burner is burning the height of the copper container the volume of water in the copper container
The mass of the lid should be included
The lids mass will not change, only the alcohol, meaning that you can still measure the mass change