Bond enthalpies Flashcards
1
Q
Why are bond enthalpies always positive
A
As energy is released through generating bonds it must mean that energy is required to breaking bonds. (endothermic)
2
Q
Define Bond entahlpies
A
It is the energy required to break 1 mol of bonds in a gaseous state
3
Q
What does the term enthalpy change of combustion mean
A
it is the enthalpy change when one mol of a compound is completely burned in oxygen under standard conditions and standard states
4
Q
What does the term enthalpy change of formation mean
A
It is the enthalpy change when one mol a compound is formed from its elements under standard states and conditions
