Calculating S-F Bond Enthalpy from Standard Enthalpy of Formation Values

[zorro]

Homework Statement

The values of standard enthalpy of formation of SF₆(g), S(g), F(g) are -1100, 275, 80 kJ/mol resp. What is the average S-F bond enthalpy in SF₆?

Homework Equations

The Attempt at a Solution

I read that the bond enthalpy is negative of enthalpy of formation from constituent atoms.
So average bond entalpy of S-F bond is 1100/6= 183.33kJ/mol. Is this correct?

 

[kk727]

The heat of a reaction is = (ΔH of Products - ΔH of Reactants).

Consider the balanced equation SF6(g) --> S(g) + 6F(g).

Try calculating the enthalpy for the entire reaction based on the information given to you, and go from there.

 

[zorro]

What is the difference between enthalpy of entire reaction and enthalpy of formation of SF₆? I think the enthalpy of formation is equal to enthalpy of reaction as SF₆ is formed from its constituent atoms.