CHEM 120 Chapter Notes - Chapter 4: Stoichiometry, Boiling Point, Intermolecular Force

• School: McGill University
• Department: Chemistry
• Course: CHEM 120
• Professor: Laura Pavelka

Document Summary

Chapter 4 : gases and kinetic molecular theory. H = difference between pressures; must measure atmos. P with barometer and + or - h. 4. 3 gas law and experimental foundations: gas" physical behaviour described by pressure, volume, temperature and amount moles (n, variables are interdependent, so only one can be determined by measuring others. Ideal gas law: quantitatively describes behaviour of ideal gas, which exhibits linear relationship among variables: no ideal gas actually exists, but simple ones (n2, o2 & h2) and noble gases near. Boyle"s law (volume and pressure: experiment: sealed shorter leg of j-shaped glass tube and poured mercury into longer leg, thus trapping air in shorter leg. Charles" law (volume and temperature: experiment: measuring volume of fixed amount of gas under constant p at different temps. Straight tube closed at one end traps fixed amount of gas under small mercury plug. Avogadro"s law (volume and amount: experiment: two small test tubes each fitted to large piston-cylinder assembly.