Estimate the average bond energy in SF6- The standard heat of formation of SF6- S F are -110- 275 and 80 kJ-mol respectively-

SF6→S+ 6F nbsp; ΔHREACTION=ΣΔH0F(PRODUCT) ΣΔH0F(REACTANT) nbsp; =[(1 mol x ΔH0F(S) + 6 mol x ΔH0F(F)] – [ΔH0F(SF6)] nbsp; =(275+6 X80) ( 110) nbsp ...

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Byju's Answer

Standard XII

Physics

Mass Energy Equivalence

Estimate the ...

Question

Estimate the average bond energy in SF₆. The standard heat of formation of SF₆, S F are -110, 275 and 80 kJ/mol respectively.

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Solution

SF_6→S+ 6F
ΔH_REACTION=ΣΔH⁰_F(PRODUCT) -ΣΔH⁰_F(REACTANT)
=[(1 mol x ΔH⁰_F(S) + 6 mol x ΔH⁰_F(F)] – [ΔH⁰_F(SF₆)]
=(275+6 X80)-(-110)
=865 kJ/mol
Average bond energy = ΔH_REACTION/6
=865/6= 144.16 kJ/mol

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Similar questions

Q. Estimate the average

S - F

bond energy in

S F_{6}

. The standard heat of formation values of

S F_{6 (g)} . S_{(g)}

and

F_{(g)}

are

1100

275

and

80 K J / m o l e

respectively.

The standard heat of formation values of $S F_{6} (g)$ , $S (g)$ and $F (g)$ are: $- 1100, 275$ and $80 K J m o l^{- 1}$ respectively. Then the average S - F bond energy in $S F_{6}$ is: