Chemistry 36

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Using Gas Laws to Solve Problems

Gas laws are the physical laws that describe the properties of gases, including Boyle’s and Charles’ laws.

One of the gas laws chemistry students learn is the ideal gas law. It has four variables. The four gas variables are: pressure (P), volume (V), number of mole of gas (n), and temperature (T). Lastly, the constant in the equation shown below is R, known as the gas constant, which will be discussed in depth further later:


The  ideal gas law is a good approximation for most gases under moderate pressure and temperature

Lesson 1 (or “Day 1”) Material
Lesson 2 (or “Day 2”) Material
Lesson 3 (or “Day 3”) Material
Lesson 4 (or “Day 4”) Material

6:17 Ideal Gas Law Introduction

10:52 Ideal Gas Law Practice Problems

12:59Which gas equation do I use?


Compare Contrast and Debate

Kickoff Debate Background: xx
1834 – Ideal gas equation
Émile Clapeyron (1799–1864) is able to combine the laws of Boyle, Charles and Avogadro into a form known as the ideal gas equation. The modern form of this law states that PV=nRT, where n is the number of moles of gas and R the universal gas constant. (Science Learning Hub)

  • Position A: Historical aspects of scientific realizations should be emphasized along with the practical aspects.
  • Position B: Practical applications of gas equations and Laws should be emphasized over the historical aspects.

Resources Documents and Links

  • Science Learning Hub (go)
  • Jove (go)

Instructor Emphasis:

  • Science & Engineering Practice: Plan and conduct investigations.
  • Cross-Cutting Concept: Patterns.