DRAFT: This module has unpublished changes.

Equipment

  • Data collection system
  • Stainless steel temperature sensor
  • Absolute pressure sensor with quick release connectors and plastic tubing
  • Sensor extention cable
  • 1500 mL Beaker
  • 50 mL Beaker
  • 250 mL Erlenmeyer flask
  • 50 mL Graduated cylinder
  • Hot plate with magentic stirrer and stirring bar
  • Utility clamp
  • Ring stand
  • 50 mL 100% Ethanol
  • 50 mL Acetone
  • 2 hole rubber stopper
  • 1200 mL water

Procedure

  1. Fill a 1500 mL beaker 3/4 full with water and place it in a hot plate with a magnetic stirrer.
  2.  Mount the 250 mL Erlenmeyer flask on a ring stand using a utility clamp and immerse the flask in water as much as possible. Do not allow any water to get into the flask.
  3.  Heat the water bath until the temperature is about 80 degrees Celsius.
  4. Place the barbed connector of the absolute pressure sensor tightly into the rubber stopper and connect it to the pressure port of the sensor with a piece of tubing. Insert the temperature sensor into the other hole in the rubber stopper.
  5.  Connect the absolute pressure sensor to the data collection system.
  6.  Start a new experiment on the data collection system and display pressure on the y axis and time on the x axis of a graph.
  7.  Make sure the rubber stopper fits tightly on the Erlenmeyer flask then remove the stopper.
  8.  Transfer 50 mL of ethanol in the Erlenmeyer flask that is in the water bath.
  9.  Once the ethanol starts to boil after about 2 minutes after being placed in the Erlenmeyer flask, remove the flask from the water and immediately insert the rubber stopper tightly.
  10.   Start recording the data and continue to collect data until the temperature drops to about 30 degrees Celsius. Then stop recording the data.
  11.  Discard the ethanol in the organic waste container.
  12.   Repeat steps 8-10 with a 60 degree Celsius water bath and 50 mL of acetone. Record data until the temperature drops to about 25 degrees Celsius.
DRAFT: This module has unpublished changes.