Chapter 5- Gases

Objectives

• Describe properties of gases compare to other physical states
• Be able to recognize the various pressure units and convert between them
• Understand the importance of absolute temperature (Kelvin) and be able to convert between Celsius and Kelvin scales
• Understand the relationship between volume and pressure (Boyles), volume and temperature (Charles), pressure and temperature (Gay-Lussac) and moles and volume (Avogadro's law) and be able to perform calculations dealing with their equations
• Be able to use the combined gas law and the ideal gas law in calculations
• Be able to calculate density and molar mass from the ideal gas law
• Be able to understand Dalton’s law of Partial pressure and how it relates to collecting a gas over water
• Understand the relationship between partial pressure and moles and calculate the mole fraction from partial pressures
• Define STP and understand its meaning to molar volume
• B able to work through gas stoichiometry calculations
• Understand the terms effusion and diffusion and be able to use Graham’s Law of effusion in calculations
• Understand root mean square speed and perform calculations
• Understand the assumptions of the Kinetic molecular Theory and how they relate to ideal gases
• Know the differences between an ideal gas and a real gas
• Know how to use the van der Waals equation to calculate deviations from a ideal gas
• Know the conditions in which an ideal gas will deviate from a real gas.(high pressure and low temperatures)