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Enthalpy changes on displacement and the reactivity series

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Introduction

27/01/2002 Ismail Enthalpy changes on displacement and the reactivity series Plan Aim: To find out that the enthalpy change of a displacement reaction between a metal and a solution of acid is related to the relative position of the two metals in the reactivity series Apparatus: * 6 Strips (1 for each set of results) of zinc metal. * 50cm� (300cm� altogether for 3 sets of results for each experiment) of copper sulphate (CuSO4) solution. * 50cm� (300cm� altogether for 3 sets of results for each experiment) of lead nitrate (Pb(NO3)2 ) solution. * 6 (1 for each set of results) ...read more.

Middle

Then weigh a strip of zinc on the weighing scale and record the weight of the strip. Use a tong to carry the zinc to the beaker, take the lid off along with the thermometer and stirring rod, drop the strip into the solution, and put back the lid on top of the beaker along with the thermometer and stirring rod in the solution. Record the temperature immediately of the solution (with zinc strip), and to do this every minute to 5 minutes, with continuous stirring. After receiving 6 readings of the temperature from the experiment, repeat the experiment two times with fresh acids of CuSO4, strips of zinc, and a new thermometer each time. ...read more.

Conclusion

to maintain even heat distribution. * Take three sets of readings to eliminate any anomalous for each experiment. * Ensure same dimensions and same weight zinc trip and ensure fresh acids are used each time. * Different thermometer is used each time. * Ensure that each solution is exactly the same temperature before the zinc is added. How I will process my results to calculate the enthalpy change between the zinc strip and the acid: Reaction between zinc and copper sulphate: Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s) Reaction between zinc and lead nitrate: To calculate the enthalpy change of reaction between the specific acid and zinc: After I have found each reaction's enthalpy change of the reaction between the specific acid and zinc strip, I will the compare each reaction's enthalpy. ...read more.

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