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BOND ENTHALPY Aim: to determine the henry flip of the chemical reception: Zn+CuSo4ZnSo4+Cu Variables: Independent: no mixed bag Dependent: switch in temperature and prison term Control: amount of CuSo4 and Zn  Raw information: Amounts of Reactants: 25cm cubed of CuSo4 and 5g of Zn Uncertainties: Puppet: 25.00_+ 0.06 Thermometer: temperature _+0.5 Balance: 6.00_+0.01 selective information Collected: Time(s)| Temp mental testing 1 stop Celsius | Temp trial 2 class celsius| Average | 0| 24| 23| 23.5| 0.5| 24| 23| 23.5| 1| 24| 24| 24| 1.5| 24| 24| 24| 2| 24| 24| 24| 2.5| 24| 24| 24| 3| surface added| coat added| Zinc added| 3.5| 42| 36| 39| 4| 49| 47| 48| 4.5| 50| 49| 49.5| 5| 49| 49| 49| 5.5| 48| 48| 48| 6| 47| 47| 47.5| 6.5| 47| 47| 47| 7| 47| 46| 46.5| 7.5| 46| 46| 46| 8| 46| 45| 45.5| 8.5| 45| 45| 45| 9| 45| 45| 45| Observations: * There was fizzing between the reaction of Zn+CuSo4 * The temperature increased at a rapid focal ratio berth once zinc was added to the copper sulfate Data affect: 51.5 51.5 Temp celsius Temp celsius Time(s) Time(s) Average Bond enthalpy MCdeltaT 25*4.18*27.5 =2821.5 kJ jetty   Percentage Error: 202-113/4.

5* ampere-second =48% Percentage Uncertainty: 3.8%   tally for enthalpy change: 0.025 moles = 2821.5J - I mole = ? 2821.5/0.025=112860 =-113KJ Conclusion: the enthalpy change make up for the reaction of: Zn+CuSo4ZnSo4+Cu is -113KJ mol but the excepted take account was -217KJ mol this is because there was an enormous dowry error of 48%. Assumptions: 1st assum! ption: all passionateness is not mixed-up 2nd assumption: that 250cm cubed = 250gr  Evaluation: * Heat escape from chapeau (secure lid) * Zinc and mass of zinc * Volume of copper sulphate and assume dit had a density of 1 ( estimate dencity) * Heat gone to thermometer * Thermometer not always submerged in copper sulphate (add more...If you want to get a right essay, order it on our website: OrderCustomPaper.com

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