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Calorimetry -Water equivalent Calorimetry
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Materials Required:

 

  1. Calorimeter
  2. Thermometer
  3. Stirrer

 

Reagents:

 

  1. Cold Water
  2. Hot Water

 

Procedure:

 

  • Water Equivalent Calorimeter

 

It is important to note that, the one should first select the sample “Cold water” to proceed with the simulation. Whenever the reading on the stop watch becomes 4 minute 30 sec, the one can then select the next sample “Hot water”.

Whenever the reading of the Hot water sample becomes 4 minute 30 sec, the one can select the next Sample Hot water + Cold Water.

 

  1. Select Cold water.
  2. Start the reaction by clicking “Start” button.
  3. Note down the time and temperature upto 4 minute 30 sec.
  4. Insert the values in the worksheet.
  5. Find out the constant temperature (T2).
  6. Enter the value in the worksheet.
  7. Select Hot water. (It will be active only after the above procedure)
  8. Repeat the steps 3, 4, 5 and 6 (T1).
  9. Select the mixture “Hot water + Cold water”.
  10. Repeat the steps 3, 4, 5 and 6 (T3).
  11. Calculate the water equivalent of calorimeter.

 

Note: It is assumed that at 4 minute 30 sec the temperature of the calorimeter becomes a constant value.

 

Observations and Calculations:

 

Water Equivalent Calorimeter
No

Time (sec)


 Temperature ( 0 C)
Cold water Hot water Mixture
 1  0      
 2  30      
 3  60      
 4 90      
 5 120      
 6 150      
 7 180      
 8 210      
 9 240      
 10 270      
 11 300      
 12  330      
 13  360      
 14  390      
 15  420      
 16  450      
 17  480      
 18  510      
 19  540      
 20  570      

 

Temperature of water and calorimeter, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»T«/mi»«mn»1«/mn»«/msub»«/math» = ....................................0 C.

Temperature of Cold water, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»T«/mi»«mn»2«/mn»«/msub»«/math» =........................................................0 C.

Temperature of Mixture, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»T«/mi»«mn»3«/mn»«/msub»«/math» =.............................................................0 C.

Heat gained by Hot water =«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»50«/mn»«mo»[«/mo»«msub»«mi»T«/mi»«mn»3«/mn»«/msub»«mo»-«/mo»«msub»«mi»T«/mi»«mn»2«/mn»«/msub»«mo»]«/mo»«/math»=................................................................cal.

Water equivalent of calorimeter =«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»W«/mi»«mo»=«/mo»«mfenced close=¨]¨ open=¨[¨»«mrow»«mn»50«/mn»«mfenced»«mrow»«msub»«mi»T«/mi»«mn»3«/mn»«/msub»«mo»-«/mo»«msub»«mi»T«/mi»«mn»2«/mn»«/msub»«/mrow»«/mfenced»«mo»/«/mo»«mfenced»«mrow»«msub»«mi»T«/mi»«mn»1«/mn»«/msub»«mo»-«/mo»«msub»«mi»T«/mi»«mn»3«/mn»«/msub»«/mrow»«/mfenced»«/mrow»«/mfenced»«mo»-«/mo»«mn»50«/mn»«/math».......................................................cal.

 

 

 Results:

 

  1. Water equivalent of calorimeter=................................cal.

 

Points to Remember while Performing the Experiment in a Real Laboratory:

 

  1. Always wear lab coat and gloves when you are in the lab. When you enter the lab, switch on the exhaust fan and make sure that all the chemicals and reagents required for the experiment are available. If it is not available, prepare the reagents using the components for reagent preparation.
  2. Properly adjust the flame of the Bunsen burner. The proper flame is a small blue cone; it is not a large plume, nor is it orange.
  3. Make sure to clean all your working apparatus with chromic acid and distilled water and ensure that all the apparatus are free from water droplets while performing the experiment.
  4. Make sure to calibrate the electronic weigh balance before taking the measurements.
  5. Clean all glass wares with soap and distilled water. Once the experiment completed recap the reagent bottles. Switch off the light, exhaust fan and Gas cylinder before leaving the lab.
  6. Discard the used gloves in a waste bin.

 

 

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