Αναζήτηση
Enthalpy
01
a thermodynamic quantity representing the total heat content of a system, commonly denoted as H
Παράδειγμα
Enthalpy plays a role in the analysis of reaction spontaneity, where negative ΔH values often indicate spontaneous processes.
The enthalpy of combustion is the heat released when a substance undergoes complete combustion with oxygen.
Enthalpy changes in chemical reactions can be determined experimentally using calorimetry, measuring heat flow.
In an exothermic reaction, the enthalpy change (ΔH) is negative, indicating a release of heat to the surroundings.
Hess's law states that the total enthalpy change for a reaction is the same, regardless of the multiple steps taken to reach the final products.
