Compare with Definitions Enthalpy Total heat content of a system at constant pressure. The enthalpy change during a chemical reaction indicates heat absorbed or released. 10 Energy Exists in various forms, including mechanical, electrical, and chemical. Electrical energy powers devices, while chemical ...
This internal total energy of the system can only change by transferring heat (Q/J/kg) from one p-T state to another, or between states. A change in energy at constant pressure, such as for instance, one atmosphere, defines the state function enthalpy (H). The temperature differences <...