Investigation of the Factor that Affects the Change in Temperature Between
Iron and Copper Sulphate
In this investigation I am going to investigate a factor that effects
the change in temperature between copper sulphate solution and iron
filings.
The variable involved in this investigation are:
· The volume of copper sulphate
· The mass of iron filings added
· Rise in temperature
· Concentration of the copper sulphate
In this in investigation my input variable that I am going to change
will be the mass of iron filings that I will place into the copper
sulphate solution to see how the change in mass effects the rise in
temperature of the solution.
My prediction for this investigation is that as I increase the mass of
iron filings the greater the change in temperature. However, there
will be a point where, when I increase the mass of iron filings, the
change in temperature will be about the same as it was with the mass
of iron filings before it as there will not be enough copper molecules
to react with the iron.
My scientific reason for my prediction; the greater the mass of iron
filings; the greater the rise in temperature, is that a displacement
reaction will take place between the iron and the copper. Iron is
higher in the reactivity series of metals than copper, and a more
reactive metal will displace a less reactive metal from its compound.
The list (left) shows that iron is more reactive than copper.
The iron replaces the copper and becomes iron sulphate:
Iron + Copper Iron + Copper
Sulphate Sulphate
Fe + CuSO4 FeSO4 + Cu
This will result in an exothermic reaction, which will give us the
rise in temperature of the solution. An exothermic reaction is one,
which gives out energy to the surroundings usually in the form of heat
and is shown by a rise in temperature. This is because, during a
chemical reaction old bonds are broken and new bonds are formed; the
8. Continue stirring. Record the temperature at which crystals begin to appear in the solution.
-------------------------------------------------------------------- The reactivity series is a table to show which metals are most reactive to the least reactive. Potassium is known as the most reactive and platinum the least. --------------------------------------------------------------
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During this reaction the solution gained heat. This is what we were monitoring. The reason why the solution gained heat is because the reaction lost heat. Energy is lost when two elements or compounds mix. The energy lost/ gain was heat. Heat is a form of energy as stated above in the previous paragraph. The sign of enthalpy for three out of the four reactions matches what was observed in the lab. For the last reaction, part four, the reaction gained heat not the solution like parts one through three. The negative enthalpy value for part four indicates that the reaction gained
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To investigate the temperature change in a displacement reaction between Copper Sulphate Solution and Zinc Powder
of Copper Sulphate. To do this I plan to work out the amount of water