Hgfds

BOND ENTHALPY

Aim: to determine the henry swop of the chemical reaction:
Zn+CuSo4ZnSo4+Cu
Variables:
Independent: no mixed bag
Dependent: change in temperature and time
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
Data Collected:
Time(s)| Temp test 1 stop Celsius | Temp trial 2 degree 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| Zinc 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 upper berth once zinc was added to the copper sulphate

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*100
=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 found for the reaction of:
Zn+CuSo4ZnSo4+Cu is -113KJ mol but the excepted value was -217KJ mol this is because there was an enormous dowry error of 48%.
Assumptions:
1st assumption: all passionateness is not lost
2nd assumption: that 250cm cubed = 250gr

 Evaluation:
* Heat escape from lid (secure lid)
* Zinc and mass of zinc
* Volume of copper sulphate and assume dit had a density of 1 ( calculate dencity)
* Heat gone to thermometer
* Thermometer not always submerged in copper sulphate (add more...If you want to get a full essay, order it on our website: Ordercustompaper.com



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