| enthalpy | The heat in a system. (09 Oct 1997) |
|---|---|
| enthalpy change | <chemistry> In a reaction, this is more or less equal to the difference between the energy put into breaking bonds and the enery gained from new bond formation. (13 Oct 1997) |
| enthalpy of formation | <chemistry> The enthalpy change when 1 mole of a substance is formed from the elements in their standard states, represented by the symbol Hf. Synonym: heat of formation. (09 Jan 1998) |
| enthalpy of fusion | <chemistry> The enthalpy change that occurs to melt a solid at its melting point. Synonym: heat of fusion. (09 Jan 1998) |