Flame Day in AP Chem
by George Flatau, HS chemistry teacher, science department chair
This video shows something we've been doing in Advanced Placement Chemistry class recently. Not everything we do is fun to watch, but this is.
This video shows something we've been doing in Advanced Placement Chemistry class recently. Not everything we do is fun to watch, but this is.
Wax is heated to boiling, which is past its flash point, the point at which it can combust without an ignition source. Trapped in the test tube, the wax lacks sufficient access to oxygen, so the test tube is plunged into cold water, shattering it. The water boils on contact with the hot tube and wax, vaporizing some of the water into steam. The steam ejects the wax out of the tube, where it has far greater surface area and access to oxygen. With high energy and access to oxygen, it bursts into flames. It's part of a demonstration of the power of surface area to affect rates of reaction.
Lycopodium powder is dried clubmoss spores. They have very high surface area (the powder is very fine) and relatively high fat content, making them highly flammable when the powder is spread into the air. If the powder is collected in one spot (such as in the bottle), it has low surface area, making it far less flammable and thus far safer.
Back
Lycopodium powder is dried clubmoss spores. They have very high surface area (the powder is very fine) and relatively high fat content, making them highly flammable when the powder is spread into the air. If the powder is collected in one spot (such as in the bottle), it has low surface area, making it far less flammable and thus far safer.
More USN News
List of 3 news stories.
-
River Campus to host Discount Tire 5K for Habitat for Humanity
Read MoreJoin the USN Habitat for Humanity Club at 1 p.m. Sunday, November 16 for the 16th Annual Discount Tire Habitat for Humanity 5K at the River Campus. Register here. Tickets are $10 for children under 10, $15 for Middler and High Schoolers, and $25 for adults. -
USN scares competition, earns 1st, 2nd at SPOOKY IX
University School of Nashville High School Quiz Bowl teams faced each other to earn top spots in a tournament at Vanderbilt University. Congratulations to Lucia Gellert '27, Liam Mooney '28, Jasmine Horwitz '26, Jackson Green '26, Oren Schwartz '29, and Mason Lack '26.Read More -
Check out Evening Classes' special USN community mahjong class
Fall evening classes are back at USN. Register now for a special USN community mahjong class using this link.Read More
Contact
Edgehill Campus
2000 Edgehill Ave.
Nashville, TN 37212
Phone: 615-321-8000
Fax: 615-321-0889
Email: info@usn.org
River Campus
1200 County Hospital Road
Nashville, TN 37218
2000 Edgehill Ave.
Nashville, TN 37212
Phone: 615-321-8000
Fax: 615-321-0889
Email: info@usn.org
River Campus
1200 County Hospital Road
Nashville, TN 37218
USN Mission:
University School of Nashville models the best educational practices. In an environment that represents the cultural and ethnic composition of Metropolitan Nashville, USN fosters each student’s intellectual, artistic, and athletic potential, valuing and inspiring integrity, creative expression, a love of learning, and the pursuit of excellence.
University School of Nashville models the best educational practices. In an environment that represents the cultural and ethnic composition of Metropolitan Nashville, USN fosters each student’s intellectual, artistic, and athletic potential, valuing and inspiring integrity, creative expression, a love of learning, and the pursuit of excellence.