About
The character 焓 is a modern coinage for the thermodynamic concept of enthalpy. As a phono-semantic compound, it uses the semantic radical 火 (huǒ, fire) to denote its connection to heat, while the component 含 (hán, to contain) provides the pronunciation and suggests the idea of contained heat energy. Created during the modern era for scientific translation, it lacks the long historical etymology of classical characters. Its sole purpose is within scientific contexts to represent a system's total heat content, defined as its internal energy plus the product of pressure and volume.