Gas Laws Bromthymol blue (Acid-base demonstration) Blow into a straw (exhale CO2) to make solution acidic (blue to yellow color change) Air Pressure - (14.7 lb/in2) Crushing Can boil water in aluminum can; invert over cold water – Vacuum created in can will cause can to crush from air pressure Break stick with newspaper (36 in. x 36 in = 10 tons of pressure) Water balloon in Erlenmeyer flask oil on side of balloon – from fully stoppered bottle Drink “pop” Barometer (32 feet tall with water) Have students blow water up a tube. Bell Jar Balloon expanding air – explosion is “quiet” without sound won’t carry Shaving cream expanding Cold boil of water talk about or show with a syringe – Marshmallow Man shrivels and expands – Hydrogen gas generator Fill mylar balloon with air and hydrogen and “explode” Exploding egg (burn until mix of hydrogen and oxygen then – explode) Nitrogen Oxides Diffusion tubes Penny in nitric acid to make smog Methane Bubbles with glycerin Liquid Nitrogen Balloons Rubber bands (Space Shuttle Challenger Accident “O-ring”) ball crack – banana peel and frozen chocolate covered bananas liquefy and solidify nitrous oxide compounds rubber stopper off of a bottle as gas expands “pop” cryogenic freezers (bioethics) MATERIALS: Marshmallows Mylar Balloons Aluminum Cans
Gas Laws Bromthymol blue (Acid-base demonstration) Blow into a straw (exhale CO2) to make solution acidic (blue to yellow color change) Air Pressure - (14.7 lb/in2) Crushing Can – boil water in aluminum can; invert over cold water Vacuum created in can will cause can to crush from air pressure Break stick with newspaper (36 in. x 36 in = 10 tons of pressure) Water balloon in Erlenmeyer flask – oil on side of balloon Drink “pop” from fully stoppered bottle Barometer (32 feet tall with water) Have students blow water up a tube. Bell Jar Balloon expanding – explosion is “quiet” without air sound won’t carry Shaving cream expanding Cold boil of water – talk about or show with a syringe Marshmallow Man – shrivels and expands Hydrogen gas generator Fill mylar balloon with air and hydrogen and “explode” Exploding egg (burn until mix of hydrogen and oxygen – then explode) Nitrogen Oxides Diffusion tubes Penny in nitric acid to make smog Methane Bubbles with glycerin Liquid Nitrogen Balloons Rubber bands (Space Shuttle Challenger Accident “O-ring”) ball – crack banana peel and frozen chocolate covered bananas liquefy and solidify nitrous oxide compounds “pop” rubber stopper off of a bottle as gas expands cryogenic freezers (bioethics) MATERIALS: Marshmallows Mylar Balloons Aluminum Cans
Gas%20%20Demos.docx