MicroSTEM 7-18: Thermodynamics Part 2
Students continued their exploration in thermodynamics today with another heating experiment. Yesterday, students started with a beaker of ice, which they heated until the water boiled. They created a time versus temperature graph of their collected data in order to observe how phase changes affect temperature. Today, students performed the same experiment with a twist: they added salt to the water. They created another graph, and compared how the salt affected the time vs. temperature curve.
Ask your student: How did adding salt change the way your graph looked? (boiling point increased, reduced the time it took to melt) What do the plateaus on the graph represent? (phase changes)