Answer :
Table A: Variation of Temperature
≈ 20°C 24 1,000 0.2 34.2 36
≈ 40C 40 1,000 0.2 26.3 146
≈ 65C 65 1,000 0.2 14.2 190
≈ 5°C 3 1,000 0.2 138.5 352
Table B: Variation of Particle Size
large 1,000 0.2 34.5 145
medium 1,000 0.2 28.9 173
small 1,000 0.2 23.1 216
From Practical perform shown below, It conclude that If you increase the temperature of a reaction, then the reaction rate will increase because particles experience more collisions at higher temperatures.
The effects of temperature and a reactant’s particle size on reaction rate.
Step 1: Gather Materials250 mL graduated cylinder
- Thermometer
- Water
- Timer
- Four 250 mL beakers
- Seven 1,000 mg effervescent tablets
Step 2: Measure the Reaction Rate at ≈ 20°C (Room Temperature)
a) Using a graduated cylinder, fill a 250 mL beaker with 200 mL of water.
b) Measure the temperature of the water and record it in the correct row of Table A.
c) Reset the timer. Start the timer as you place a full tablet into the beaker.
d) Record the reaction time on the Data Sheet in the correct row of Table A.
e) Compute the reaction rate to the nearest mg/L/sec. Record it in the last column of Table A.
Step 3: Measure the Reaction Rate at ≈ 40°C Repeat Step 2, heating the water to approximately 40°C using a hot plate during sub-step a.
Step 4: Measure the Reaction Rate at ≈ 65°CRepeat Step 2, heating the water to approximately 65°C using a hot plate during sub-step a.
Step 5: Measure the Reaction Rate at ≈ 5°CRepeat Step 2, chilling the water to approximately 5°C inside an ice bath during sub-step a. (To create an ice bath, place 100 mL of ice and 100 mL of water in a 600 mL beaker of ice water and wait until the temperature reaches approximately 5°C. To save time, you may wish to set up the ice bath, using an additional 250 mL beaker, while working on Step 4.)Variation of Particle Size
Step 6: Measure the Reaction Rate for a Full Tablet
a) Using a graduated cylinder, fill a 250 mL beaker with 200 mL of water.
b) Reset the timer. Start the timer as you place the tablet in the beaker.
c) Record the reaction time on the Data Sheet in the appropriate row of Table B.
d) Compute the reaction rate to the nearest mg/L/sec. Record it in the last column of Table B.
Step 7: Measure the Reaction Rate for a Partially Broken Tablet Repeat Step 6, but this time break the tablet into eight small pieces on a piece of filter paper. Make sure to place all of the pieces into the beaker at the same time.
Step 8: Measure the Reaction Rate for a Crushed Tablet Repeat Step 6, but this time crush the tablet into tiny pieces on a piece of filter paper. Make sure to place all of the pieces into the beaker at the same time.
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