two-year college

The BCE (“Best Class EVER”) - Dry Ice Day

That it was the "Best Class EVER" seems to be the common refrain every year by most every one of Yvonne Clifford's students over the past 30 years after the Dry Ice Day. This is an engaging chemical to bring to the chemistry classroom or an outreach event because many concepts can be applied and it affords a great deal of fun and excitement! 

Surprising Shrinking Styrofoam Stick: Using the Gas Laws to Get a Square Peg into a Round Hole

Polystyrene foam sticks with a square or rectangular profile will not fit into a round target hole (e.g., the opening of a soda bottle) at room temperature. However, they do contract sufficiently in contact with liquid nitrogen to fit into the hole and produce a simple demonstration of Charles’s Law. Many other polymer foams do not shrink under these conditions, but still provide opportunities to discuss and explore their structure and chemistry.

Will a Watched Pot Ever Boil? A Simple, but Effective, Chemistry Lab: Constructing a Heating Curve of Water

This lab guides students through taking data and constructing their own heating curve for water. It requires no special equipment, is low prep, is safe, and can even be done at home for homeschool or distance learning. Even though the lab activity itself is relatively simple and straightforward, the concepts still engage students in higher level thinking and gives them important practice with laboratory techniques and forming hypotheses.