part 3 - determining the enthalpy change of a reaction...
TRANSCRIPT
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Hands on Experiment :Determining the enthalpy change
of a reaction with the use of Arduino system
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Setup for the ExperimentDetermining the enthalpy change of metal displacement reaction
Zn(s) + CuSO4(aq) Cu(s) + ZnSO4(aq)
Using Arduino system with temperature sensor to record the temperature change during the reaction
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Equipment required for Experiment
Copper (II) sulphate
Pipette Filler
Pipette
PolystyreneCup 250cm3
beaker
Glass rodSpatula
ElectronicBalance
Zinc powder
Copper (II) sulphate
Zinc
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Equipment required for Arduino system
Waterproof DS18B20 Temperature Sensor
Resistor (4.7k ohm)
Solderless Breadboard
3 Jumper wires (Male to Male)
Arduino UNO
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http://www.sciencebuddies.org/science-fair-projects/how-to-use-a-breadboard.shtml
Basic : Solderless breadboard(麵包板)
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Analog Input /OutputPower
Digital Input / Output
USB
9V Power
Basic : Arduino UNO board
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Operation of the Arduino system 1. Wiring of temperature sensor in Arduino system
https://create.arduino.cc/projecthub/TheGadgetBoy/ds18b20‐digital‐temperature‐sensor‐and‐arduino‐9cc806
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Power : 5V (+)GND (‐)
Signal : 2
Identify the pins
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Connect red jumper wire to 5V
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Connect black jumper wire to GND
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Connect Yellow jumper wire to 2
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Connect another end of red jumper wire to breadboard +
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Connect another end of black jumper wire to breadboard ‐
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Bend the 4.7k ohm resistor to “C” shape
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Connect the bended resistor to breadboard + and A12
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Connect another end of yellow jumper wire to breadboard B12
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Connect red and black wire of temp sensor to breadboard + and ‐ respectively
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Connect yellow wire of temp sensor to breadboard E12
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Check all wires and resistor to see all are firmly secured on Arduino and breadboard
https://www.youtube.com/watch?v=p6AN6rPWzfI
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Experimental Setup
Magnetic Stir bar Magnetic Stirrer
Polystyrene cup
Arduino System withtemperature sensor
Computer
Copper(II)sulphate solutionZinc powder Clamp and stand
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Points to note
Magnetic Stir bar should not to contact with temp sensor
Avoid glass rod from contact with temp sensor
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Program Files (x86)>Arduino>libraries
2. Copy the following into Arduino LibrariesOne WireDallas Temperature_Library
Waterproof DS18B20 Temperature Sensor
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3. Upload Arduino code
Waterproof DS18B20 Temperature Sensor
Open Arduino IDE software
Copy the code into Arduino IDE
Save the Arduino Sketch as “temp”
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4. Checking the port of Arduino system to record the temperature data
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5. Uploading of code into Arduino Board
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6.Checking the port of Arduino system to start record the temperature data by PLX‐DAQ
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7.Data Collection by Excel plug‐ins
Total duration : 540 seconds 540 data
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8.Data analysis by using Microsoft Excel
T2
T1
T = T2 – T1
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Scientific Inquiry opportunity
To investigate the enthalpy change of neutralization