Vernier Software and Technology
Vernier Software & Technology

Gas Pressure

Figure from experiment 7 from STEM 2 with Vernier and LEGO® MINDSTORMS® NXT


An important property of a gas is its pressure. Pressure is the force exerted by a gas over an area, such as when you blow up a balloon or inflate a bicycle tire. The pressure of a gas is influenced by its temperature; for example, the pressure may become dangerously high inside a spray-paint can if it is left in the sun.

When two or more chemicals react, gases may be produced. The rate at which the chemical reaction takes place can be affected by a number of different factors including temperature. In this activity, you will see how temperature affects the rate at which an effervescent antacid tablet reacts with water and releases a gas. The rate at which the reaction occurs is directly proportional to the rate of gas production. You will use a Gas Pressure Sensor to measure this rate by recording the pressure variation in a closed container as the reaction proceeds.


  • Use a Gas Pressure Sensor and NXT to measure pressure changes during a chemical reaction.
  • Model pressure data using a linear function.
  • Use the concept of slope to describe the effect of temperature on chemical reaction rates.

Sensors and Equipment

This project/activity features the following Vernier sensors and equipment.

Additional Requirements

You will also need NXT Sensor Adapter and a LEGO MINDSTORMS NXT robotics system.

STEM 2 with Vernier and LEGO® MINDSTORMS® NXT

See other experiments from the lab book.

2First-Class Levers
3Audio Assistant
6String Tension Tester
7Gas Pressure
8Yeast in Action
9Grip Strength
10Cartesian Diver
12Lemon Battery
13Battery Tester
14Solar Cells
15Solar Tracker
16Mapping a Magnetic Field
18Migrating Robot
19Magnet Finder
20Mine Sweeper

Project/activity 7 from STEM 2 with Vernier and LEGO® MINDSTORMS® NXT Lab Book

<em>STEM 2 with Vernier and LEGO<sup>®</sup> MINDSTORMS<sup>®</sup> NXT</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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