Calorimeter
Imagine trying to keep your coffee hot in a travel mug during a long drive. Just like the travel mug is designed to insulate and measure how well it retains heat over time, a calorimeter measures the heat of chemical reactions by isolating them in an insulated environment. The travel mug's ability to trap heat is akin to the calorimeter's function of containing a reaction to precisely measure heat changes, much like observing how long your coffee stays warm.
Practice Version
Calorimeter: An object used for measuring the heat of chemical reactions. Calorimeter. A calorimeter is a device that helps us measure the amount of heat released or absorbed during a chemical reaction.