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• Low density: the molecules of gases are far apart compared to solids and liquids.
• Diffusibility: This is the property of a gas to pemeate or fill in uniformly the entire space where it is placed.
• expansibility: gases are very expansible. they easily occupy the whole space of the container.
• compressibility: is a property of a gas to change in volume when pressure is changed.
• pressure: gases exert pressure against the wall of the container.
• Boyle's law: states that volume and pressure are inversely proportional at constant temperature. When P increases V decreases at constant.
• Atmospheric Pressure: The pressure exerted by the atmosphere on a surface.
• Charle's Law: The volume of a gas is directly proportional to the pressure of the gas.
• Combined Law: states that pressure and volume are inversely proportional to each other.
• avogadro's law: states that volume of a gas is directly proportional to the number of mole.
• Ideal gas law: illustrates the relationship among p,v,t and the number of moles of a gas.
• Physical Change: occur when there is no breaking and forming of bonds. The substance remain the same.
• chemical change: occur when there is breaking
• Evidences: 1. production of light 2. evolution of gas 3. change in temp. 4. change in the intrinsic property 5.formation of procipitate
• 3 elements: fire, oxygen, and sufficient heat.
• Phlogiston theory: states that a material that burns produces a substance called phlogiston.
• Antoine Laurent De Laviosier - Father of Physiological Chemistry
• Theory of oxidation: states that a material burns as it reacts with oxygen.