Activity Overview
In this activity, students examine how temperature affects the rate of gas production during a chemical reaction. They measure this rate by recording the pressure variation using a pressure sensor and model the pressure data using a linear function.
Before the Activity
Connect the pressure sensor to Channel 1 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 39 - 46 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Attach one end of the tubing to the pressure sensor and the other end to the flask
Fill the flask with 200 ml of room temperature water, add the antacid tablet, and begin data collection
Repeat the experiment for warm water
Compare the pressure versus time graphs for both trials
Calculate the slope using any two data points and determine the equation for each plot
Compare the two equations
Use the concept of slope to describe the effect of temperature on chemical reaction rates
After the Activity
Students' will examine the data, fill in the Student Data Collection and Analysis Sheet, and answer questions listed on it.
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary