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 Chapter 9
The gas laws
LEARNING OBJECTIVES
In this chapter you will learn how to:
âuse the concepts of the mole, the molar mass and the Avogadro constant
âsolve problems using moles, molar masses and the Avogadro constant
âuse the concept of pressure
âsolve problems using the equation of state of an ideal gas
âunderstand the assumptions behind the kinetic model of an ideal gas
âunderstand the connection between average kinetic energy of molecules and the kelvin temperature
ârecognise the conditions under which a real gas may be described by the ideal gas law.
GUIDING QUESTIONS
âHow can the macroscopic behaviour of gases be explained in terms of the motion of molecules?
âWhat is the origin of pressure in a gas?