Question

which statement defines calorimeter?
○ a device that measures the heat that is gained or lost in a chemical change
○ a device that measures the potential energy of an element
○ a device that is used to measure heat capacity
○ a device that is used to measure temperature

Explanation:

A calorimeter is specifically designed to measure the heat change (gained or lost) during a chemical (or physical) process. The second option is incorrect as calorimeters don't measure potential energy of elements. The third option is partially related but the primary function is measuring heat in reactions, not just heat capacity generally. The fourth option is wrong as thermometers measure temperature, not calorimeters.

Answer:

A. a device that measures the heat that is gained or lost in a chemical change