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.
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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.
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Spring sports season ends with podium finishes, trophies
The girls lacrosse team ended its season in overtime to become state runner-up. Tennis players Carter Kojetin '29 finished as a state quarterfinalist, Sophie Oliver '26 and Mary Kate Adler '28 finished as state semifinalists, and Veer Kodali '29 and Max Parker '29 finished as state champions. Meanwhile, eight runners competed at the state track and field meet in Knoxville, where Griffin Davidson '27, Caleb Freifeld '28, Drew Zwerner '28, and Jack Fruin '27, sprinted to first in the 4x800m relay and Jack also placed first in the 800m dash.Read More -
USN creates the Juliet Douglas Endowed Fund for Student Success
For the entire USN community: an invitation to give in gratitude, in celebration, and in honor of the woman who has given so much to our school. Make a gift at usn.org/giving to support students with needs beyond tuition and honor Interim Director Juliet Douglas.Read More -
Middle School Quiz Bowl competes at national championship
The Middle School Quiz Bowl finished off another successful season with a trip to the Middle School National Championship Tournament in Chicago. The team fought hard and ended the season as a top-100 program in the country, finishing 75th overall. Congratulations to the team on a great performance and to Lucas Lupu ’31, named an All Star for being the fifth-highest scorer nationwide.Read More
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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.