Displacement Reaction :: Papers

Displacement Reaction The aim of my experiment is to gravel out what happens to the rage of the coat and copper sulfate solution when mavin of the variables is changed. Key variables tot up of copper sulphate solution amount of zinc I am going to investigate what happens to the temperature of the zinc and copper sulphate solution as the amount of zinc is increased. The equation to show this answer is Zn + CuSO4 ZnSO4 + Cu The enthalpy change for the reaction is H = -217kJ groin This means that if 1 mole of solution is utilize of each substance, the heat given off will be 217,000 Joules. Apparatus 1 stress tube 20ml of copper sulphate solution for each experiment zinc Rubber bung Thermometer Prediction I think that as the amount of zinc is increased, the temperature of the solution will also increase. I have used the following principle to predict some results of this experiment. q = Q mc where q = temperature rise, Q = quantity of heat, m = mass of solution (20g) and c = the specific heat capacity of wet which = 4.18Jg K . 65g Zinc 217000 joules 1g Zinc 217000 = 3338 joules 65 Therefore for 1g of zinc 3338 =39c rise 20x4.18 I can now use this formula proportionately to predict results for my investigation. For 0.3g of zinc 0.3 x 39 = 12c rise For 0.5g of zinc 0.5 x 39 = 19.5c rise For 0.7g of zinc 0.7 x 39 = 27.3c rise For 0.9g of zinc 0.9 x 39 = 35.1c rise I have used this reading in order to predict the results of the temperature rise I expect to see as the amount of zinc is increased. I have also used this information to plan my experiment.