Education Technology

Mix It Up: Mixing Liquids of Different Temperatures

Published on 07/02/2009

Activity Overview

In this activity, students' will use temperature sensors to measure temperatures of water samples before and after mixing. They compare the mixing temperatures to a linear prediction.

Before the Activity

  • Connect temperature probes to Channel 1 and Channel 2 on the CBL 2™ or Vernier LabPro®
  • Connect the CBL 2 or LabPro to the calculator using the Unit-to-Unit cable
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 61 - 67 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to your class.

    Follow the Activity procedures:

  • Fill Cup 1 with 100 ml cold water and Cup 2 with 150 ml hot water
  • Place the CH1 probe in Cup 1 and the CH2 probe in Cup 2, and record the temperature readings in the Data Table
  • Pour the contents of Cup 1 into Cup 2 and record the final temperature of Cup 2 in the Data table
  • Repeat the experiment with equal volumes of hot and cold water
  • Understand how to predict mixture temperature and verify the prediction
  • After the Activity

    Students' will complete the Student Data Collection and Analysis Sheet and answer the questions listed on it.

    Review student results:

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