2.1 Thermochemistry Definitions Flashcards
1
Q
Bond enthalpy
A
The amount of energy required to break one mole of the stated bond in the gas phase
2
Q
Enthalpy change
A
The heat energy change measured under a constant pressure.
3
Q
Enthalpy change of reaction
A
The enthalpy change when quantities of substances in standard states react completely.
4
Q
Enthalpy of combustion
A
The enthalpy change when one mole of a substance is burned in excess oxygen
5
Q
Hess’s Law
A
The enthalpy change of a reaction is independent of the route taken.
6
Q
Mean bond enthalpy
A
The enthalpy change when one mole of a substance in its standard state under standard conditions is formed from its elements under standard conditions.
