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Amount and rate of heat transfer using iron spheres and liquid nitrogen

Dean Campbell | Tue, 06/04/2024 - 11:00

When iron spheres at room temperature are added to liquid nitrogen, the nitrogen boils as heat is transferred in from the iron. The amount of liquid nitrogen boiled depends on the amount of heat transferred, which depends on the mass of the iron added. However, the rate at which liquid nitrogen boils depends on the surface area of the iron in contact with the liquid nitrogen. These phenomena can be studied with experiments which measure the mass lost by the boiling liquid nitrogen.

Five Tips for Creating Chemistry Tutorials on YouTube Shorts

Josh Kenney | Tue, 05/09/2023 - 13:10

YouTube Shorts are 60-second vertical aspect ratio videos that are meant for cell phone viewing. Since they are shorter and easier for students to access than traditional YouTube videos, Josh Kenney has started creating more of them for his blended chemistry class. Check out some of his tips for creating effective chemistry tutorials with YouTube Shorts.

How to Use TikTok and YouTube Shorts in Your Chemistry Class

Josh Kenney | Tue, 01/24/2023 - 15:42

TikTok and YouTube Shorts are video sharing platforms for short-form, vertical aspect videos. Both of these services are growing more quickly in popularity compared to more traditional video formats. Josh Kenney shares some of the ways that he is using short-form videos in his chemistry class and shares a free resource (an exam review worksheet that links to a YouTube Shorts playlist through a QR code).

Does Alka-Seltzer Tell the Truth? A lab activity with a video pre-lab assigment

Josh Kenney | Mon, 11/15/2021 - 08:55

The lab activity shared here is a simple experiment where students use stoichiometric principles to experimentally determine the amount of sodium bicarbonate in an Alka-Seltzer tablet. Novice students tend to find stoichiometric calculations difficult, so practicing the calculations on a pre-lab assignment boosts their confidence and ultimately leads to more successful labs. The Asynchronous Video Pre-Lab Assignment shared here demonstrates the procedure and the calculations required in the experiment.

Video Pre-Labs Improve the Lab Experience

Josh Kenney | Sun, 10/17/2021 - 14:49

Teaching during COVID was challenging; however, a few positive results surprisingly emerged. For one, Josh Kenney filmed a small library of chemistry lab videos for use in virtual chemistry labs after his school switched to remote learning. At first, he wasn't sure if he would continue to use those videos when his district returned to in-person instruction until he discovered that they would make excellent pre-lab assignments. 

Formative Assessment Using Nearpod with Michael Farabaugh

Deanna Cullen | Thu, 02/04/2021 - 17:34

Some of the challenges associated with virtual instruction include connecting with students and checking for understanding in real time. On February 2nd, Michael Farabaugh presented a ChemEd X Talk about how he uses the interactive features of Nearpod to create formative assessment items that provide valuable feedback and facilitate student participation. You can watch the edited recording of Michael's Talk and access the lesson he shared during the presentation here.

Whiteboarding in a Virtual Classroom with Melissa Hemling

Deanna Cullen | Wed, 01/27/2021 - 16:28

On January 26, 2021, Melissa Hemling presented a ChemEd X Talk about “whiteboarding” in a hybrid or virtual classroom. Students collaborate in small groups on classkick.com to digitally analyze data, create and modify models, and/or complete practice problems. Melissa shares how she uses the digital whiteboards to gauge student understanding and pinpoint misconceptions like she did pre-COVID. You can watch the edited recording of Melissa's Talk and access the document she shared during the presentation here.