Define Calorimetry.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept**: Calorimetry is a scientific method used to measure heat transfer. It involves quantifying the amount of heat that is either released or absorbed during a physical or chemical process.

2. **Defining Calorimetry**: The formal definition of calorimetry is the measurement of the amount of heat evolved or absorbed during a chemical reaction, a change of state (like melting or boiling), or the formation of a solution.

3. **Applications of Calorimetry**: Calorimetry is used in various fields, including chemistry, physics, biology, and engineering, to study the thermal properties of substances and reactions.

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