Bond Enthalpy Flashcards
1
Q
Bond enthalpy is what?
A
Energy required to break one mole of chemical bonds in gaseous state, to form two moles of gaseous atoms.
2
Q
Eg of bond enthalpy
A
X-Y (g) —> X(g) + Y(g)
3
Q
When energy is given out it shouod comply with Hess law how?
A
By giving out energy when a bond is made
4
Q
If bond making is released what does it tell us
A
•Endothermic
(^H positive)
Negative is the same thing
5
Q
Bond breaking is always what?
Bond making is always what?
A
BB= +++++++
BM=————
6
Q
Mean bond enthalphies occur why?
A
These bonds in the data booklet appear on several compounds
7
Q
Bond enthalpy in short is
A
BM/ BB
AH=+100+(-6152)
AH=-114 KJ mol-1
