1. Module 3 Intro

1.11. Lab

Lesson 2

Module 3—Behaviour of Gases

Lab: Charles’ Law

 

The following lab activity will enable you to complete a virtual investigation of Charles’ law. Be sure you read through the Background, Procedure, and Assignment before beginning the lab.

 

Record the data collected from the experiment in Part 1 of the assignment, and complete the questions under Procedure 1 and Procedure 2. Save copies of the graphs you drew for the data. Save a copy of your work in your course folder.

 

Read

 

The combined gas law describes a relationship among pressure, volume, and temperature consistent with Boyle’s law and Charles’ law. Read “The Combined Gas Law” on page 156 to 158 in your textbook. Carefully work through “SAMPLE problem 4.1” and “COMMUNICATION example 4” on pages 157 and 158.

 

Self-Check

 

SC 6. A gas has a volume of 32 L, a temperature of 22°C, and a pressure of 92 kPa. If the temperature is decreased to 19°C and the pressure is increased to 98 kPa, what is the new volume of the gas?


SC 7. The combined gas law is very useful, since it is possible to obtain both Boyle’s law and Charles’ law from this one formula.

  1. Explain how Boyle’s law may be obtained from the combined gas law.
  2. Explain how Charles’ law may be obtained from the combined gas law.
Check your work.
Self-Check Answers

 

SC 6. First, list all the variables.

 

 

 

SC 7.

  1. If the temperature is held constant, T1 = T2 = T. Since T is identical on both sides of the equation, they will cancel, reducing the combined gas law to Boyle’s law.



  2. If the pressure is held constant, P1 = P2 = P. Since P is identical on both sides of the equation, they will cancel, reducing the combined gas law to Charles’ law.