SLO 1.2 - Perfect and Real Gases

Key Concepts and Skills

• Ideal (“perfect”) gases: Explain the characteristics of an ideal gas and use the ideal gas law to solve for any unknown variable of state (pressure, volume, temperature, and amount of substance)
• Deviations from ideality: Clarify why (and under what conditions) real gases will deviate from ideal behavior
• Compressibility: Given a gas law or state variables for a gas, solve for compressibility (\(Z\)) and discuss how the resultant function or value of \(Z\) indicates deviation from ideal behavior
• Alternative gas laws: Plot and discuss the features (constants, behavior, etc.) of new gas laws like the Virial or Van der Waals equation.
• Critical behavior: Identify what critical behavior is and calculate the critical constants (\(p_c\), \(T_c\), and \(V_c\)) and critical compressibility (\(Z_c\)) for a particular gas or equation of state. Discuss how isotherms above, below, and at the critical temperature correspond to molecular behavior and phase.

Reading

• From the textbook:
  • Topic 1A
  • Topic 1C
• POGIL Activities
  • Fundamental 1: Measurable Properties
• Other:
  • Real Gases
  • Virial Coefficients
  • Engel and Reid (alternative textbook): Chapter 1.4 - 1.5
  • McQuarrie (alternative textbook): Chapter 16

Important Terms

Sample Assessment Question

External Videos, Tutorials, Simulations

• PhET Simulation - Gas Properties
• Gas Law Simulation
• Virial Equation of State
• Crash Course Chemistry - Real Gases

Practice Problems

• From the textbook:
  • Exercises: 1A.1, 1A.2, 1A.9, 1A.13
  • Problems: 1A.2, 1A.7
  • Exercises: 1C.3, 1C.6, 1C.9
  • Problems: 1C.4, 1C.8, 1C.16, 1C.17
• From other external sources:

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