Avogadro’s Law

Project name: Avogadro’s Law

This virtual laboratory is intended for use in chemistry classes on the following topics:

  • 8th grade. Chapter V. “Stoichiometric calculations”.

Goals:

  • Study of Avogadro’s law using the PHET Interactive Simulation: Gas Intro.
  • Demonstration that equal volumes of different gases under the same conditions (temperature and pressure) contain the same number of molecules

Practical part

In this Phet simulation, we will study Avogadro’s law.

1. Start the simulation. You will be given two modes: “Intro “ and “Laws”. Select the “Laws” mode.

2. Familiarize yourself with the tools.

Virtual Experiment

Avogadro’s Law: “Equal volumes of different gases under the same conditions (temperature and pressure) contain the same number of molecules.”

3. Duplicate the simulation: Use Split Screen mode on your computer / laptop.

4. In the Hold constant section,set the constant parameter to Volume (V).Check the box in the Width section. Now you have the same volume in both cases.

5. Pump two different gases into the container: one heavy, the other light. Pay attention to the pressure gauge and thermometer in both cases.

6. Repeat the experiment several times.What did you notice? With the same volume, the pressure and temperature in both containers are the same, regardless of the type of gas. Does this experiment support Avogadro’s Law?

Conclusion

In this work, using a virtual simulation of PhET Interactive Simulation: Gas Intro, an experiment was conducted that supports Avogadro’s Law. It was shown that with the same volume, the pressure and temperature in containers with different gases remain the same, regardless of the type of gas. This clearly demonstrates that, under the same conditions of temperature and pressure, equal volumes of ideal gases contain the same number of molecules.