Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Linear Functions

9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

CBL™/CBL 2™
Sensor - Gas Pressure
TI Connectivity Cable
Unit-to-Unit link cables
Vernier LabPro®

• ##### Other Materials
This is Activity 5 from the EXPLORATIONS Book: Real-World Math Made Easy.

The following materials are required for this activity :
• Empty 500 ml container
• One-hole rubber stopper
• Safety goggles
• Effervescent antacid tablets
• Water, both room temperature and warmed

## Keep It Bottled Up: Linear Rates of Pressure Increase

#### 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