Category Archives: Student Accomplishments

Cadets Measure the Energy Content of Foods

Students in BC’s sophomore chemistry class performed experiments on two different types of food to determine how much energy (number of calories) was stored in them.

Working in pairs, the cadets constructed calorimeters, devices that use water to capture the heat released by foods when they are burned. (Burning food gives off the same amount of energy as digesting food.) By measuring the temperature change of the water in their calorimeters, cadets were able to calculate how much energy was contained in each type of food.

The results were perhaps not quite what you’d think. Walnuts contain twice as many calories per gram as marshmallows.

And here’s another way to look at the results:

Bag of walnuts: $6.99
Bag of marshmallows: $1.39
Burning food in school while learning at the same time: Priceless

Presenting: The Amazing Moles of 2010!

Click the image to view the nearly 120 amazing moles that Savannah Arts Academy students crafted in honor of Mole Day.

A mole is a number of particles–typically, a number of atoms or molecules. The numerical value of one mole is 6.02 x 10 ^ 23.

If you weigh out an element’s atomic mass in grams, you have one mole of that element’s atoms. For example, carbon has an atomic mass of 12.01 amu; if you weigh out 12.01 grams of carbon, you have indirectly counted out one mole of carbon atoms.

Mole Day starts at 6:02 am on 10 / 23 (October 23rd). Get it? We did.