In thermodynamics, the term 'enthalpy' refers to the total heat content of a system, encompassing internal energy plus the product of pressure and volume. It is a significant concept in understanding energy exchanges in chemical reactions and physical processes. Enthalpy changes provide valuable insights into whether a reaction is endothermic (absorbing heat) or exothermic (releasing heat). The measurement of enthalpy plays a crucial role in fields such as chemistry, engineering, and environmental science, aiding in the design of energy-efficient processes.