Activity Detail
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Vernier - Vapor Pressure of Liquids
 


Activity Overview

Students investigate the relationship between the vapor pressure of liquid and its temperature. They use a Pressure Sensor and a Temperature Probe to collect pressure and temperature data. Students compare the vapor pressure of two liquids.

Before the Activity

Print the attached .pdf for each student. You will find one .pdf for EasyData and one .pdf for DataMate.

During the Activity

Distribute the pages to your class.

Follow the Activity procedures:
  • Attach the Pressure Sensor to the flask and the Temperature Probe to the water bath
  • Introduce methanol into a flask
  • Measure the temperature and pressure of methanol kept in a water bath at room temperature
  • Measure the temperature and pressure of methanol kept in 4 different water baths at 0 to 15 C, 10 to 15 C, 20 to 25 C, and 30 to 35 C
  • Calculate the corrected atmospheric pressure
  • Plot a graph of vapor pressure versus temperature
  • Repeat the experiment with ethanol at room temperature
  • Compare the vapor pressure of methanol and ethanol

    		After the Activity

    		Students will complete Student Data Collection and Analysis Sheet.

    Review student results
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary

    		Other Downloads




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    Subject Area:
    Science : Chemistry : Solutions

    Author:
    Vernier Software & Technology

    Level:
    9-12

    Activity Time:
    60 Minutes

    Device:
    TI-83 Plus Family, TI-84 Plus Family

    Apps:
    DataMate, EasyData™

    Software:
    TI-GRAPH LINK™

    Accessories:
    CBL™/CBL 2™, Sensor - Gas Pressure, Sensor - Temperature, TI Connectivity Cable, TI-GRAPH LINK™ Cable, Unit-to-Unit link cables

    Other:

  • Four 1 liter beakers
  • 20 ml syringe
  • Rubber stopper assembly
  • Plastic tubing with two connectors
  • Two 125ml Erlenmeyer flasks
  • Methanol
  • Ethanol
  • Ice


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