Energetics Flashcards
1
Q
Define Enthalpy of Formation
A
The enthalpy change when ONE mole of a substance is produced from its elements under standard conditions in its standard state
2
Q
Define Enthalpy of Combustion
A
The enthalpy change/ heat change at a constant pressure when ONE mole of a substance is completely burned in oxygen under standard conditions in its standard state
3
Q
What are the standard conditions?
A
100KPa and 298K
4
Q
Equation for Calorimetry
A
q=mcΔ t
5
Q
Equation for ΔH
A
ΔH= q/moles
6
Q
Hess’s Law
A
Hess’s law states that total enthalpy change for a reaction is
independent of the route by which the chemical change takes place
7
Q
Define the Mean Bond Enthalpy
A
The amount of energy required to break one mole of a specific covalent bond in its gaseous state
