ThermochemistryMedium

Question

Estimate the average S–F bond energy in SF6. The values of standard enthalpy of formation of SF6(g), S(g) and F(g) are −1100, 275 and 80 kJ/mol, respectively.

Options

A.183.33 kJ/mol
B.309.17 kJ/mol
C.366.37 kJ/mol
D.345 kJ/mol

Solution

$SF_{6}(g) \rightarrow S(g) + 6F(g)$

$\Delta H = (275 + 6 \times 80) - ( - 1100) = 6 \times B.E._{S - F} $$$\therefore B.E._{S - F} = 309.17\text{ kJ/mol}$$

Create a free account to view solution

View Solution Free
Topic: Thermochemistry·Practice all Thermochemistry questions

More Thermochemistry Questions

Enthalpy of neutralization of H3PO3 by NaOH is −106.68 kJ/mol. If the enthalpy of neutralization of HCl by NaOH is −55.8...The ΔGo values for the hydrolysis of creatine phosphate (creatine-P) and glucose-6-phosphate (G-6-P) are(i) Creatine-P +...Enthalpies of combustion of CH4, C2H4 and C2H6 are −890, −1411 and −1560 kJ/ mole, respectively. Which has the highest f...The enthalpies of neutralization of a weak base AOH and a strong base BOH by HCI are -12250 cal/ mol and -13000 cal/ mol...The enthalpy of formation of liquid methyl alcohol in kJ/mol, using the following data (in kJ/mol).Heat of vaporization ...