Report Enthalpy of Displacement reaction

Enthalpy of Displacement

IB Topic: Energetics
Assessment Criteria: DCP, CE

DATA COLLECTION AND PROCESSING

ASPECT
MARKS AWARDED
Recording raw data:

Processing raw data:

Presenting Proceeded data:

TOTAL:

CONCLUSION AND EVALUATION

Conclusion

Evaluation

Improving the procedure

TOTAL

AIM: Experimentally determine the enthalpy change of the displacement reaction between zinc and copper sulphate.

Zn (s) + CuSO4 (aq) Cu (s) + ZnSO4 (aq)

Materials Required:
1M of CuSO4
Zinc powder
Beaker
Measuring Cylinder
Thermometer
Electronic weighing balance
Spatula
Thermometer
Stop watch

PROCEDURE:

Measure 25cm3 of 1M of CuSO4 in a beaker
Using a spatula take out zinc powder from its container and weigh out 2.5g of it using an electronic weighing machine.
Use the thermometer to measure the initial temperature of the CuSO4 for 3 minutes.
Slowly add the zinc powder to the CuSO4 solution and stir it with a glass rod.
Measure the temperature of the solution every 30 seconds. The time starts from the moment the zinc powder is put in the CuSO4 solution.
Note down the temperature readings till the temperature reading falls for 2 minutes.
Observe any physical changes in the mixture and dispose it by throwing it in the sink.

DATA COLLECTION:

Volume of CuSO4
25cm3
Concentration of CuSO4
1.0 M
Mass of CuSO4
25g
(volume = mass, because solution is mixed in water)
Specific Heat capacity of water
4.2 kJ kg-1 K-1
Mass of Zinc powder
2.5g
Average initial Temperature
28°C
Final Temperature
50°C
Change in temperature
22°C or 295K

Temperature change over 5 minutes(420s)

Time(s)
Temperature (°C )
0
28
30
28
60
28
90
28
120
28
150
28
180
28
210
30
240
42
270
50
300
48
330
48
360
46
390
44
420
42

OBSERVATIONS:

The blue copper sulphate solution was blue in colour, after the addition of Zinc powder, the solution became colourless. There was a grey substance that settled down at the bottom of the beaker. This