Using a CBL unit, a temperature sensor, and a graphing calculator to model the kinetics of consecutive first-order reactions as safe in-class demonstrations

The use of Calculator-Based Laboratory (CBL) technology, the graphing calculator, and the cooling and heating of water to model the behavior of consecutive first-order reactions is presented, where B is the reactant, I is the intermediate, and P is the product for an in-class demonstration. The activity demonstrates the spontaneous and consecutive heating then cooling of water.