noun. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure.
- total heat
- physical property
- heat content
- ἐνθάλπω (Ancient Greek (to 1453))
Example sentences of the word enthalpy
The enthalpy change of a reaction is the amount of heat absorbed or released as the reaction takes place, if it happens at a constant pressure.
2. Noun, singular or mass
It is important to note that enthalpy is not strictly a measure of heat but is related to pressure and volume, as you can see in the formula below.
Answer: First, write out your equation: Tf = Ti - ( Reaction enthalpy / ( (heat capacity of contents) x (mass of contents) + (Calorimeter constant) ) )