(i) Estimate the average S.F bond energy in SF_(6). The standard heat of formation values of SF_(6)(g),S(g) and F(g) are -1100, 275 and 80 kJ "mol"^(-1) respectively. (ii) The heat liberated on complete combustion of 7.8 g benzene is 327 kJ. This heat has been measured at constant volume and at 27^(@) C. Calculate heat of combustion of benzene at constant pressure at 27^(@) C, (R = 8.3 J"mol"^(-1) K^(-1))

(i) Estimate the average S.F bond energy in SF_(6). The standard heat

1.	(i) Estimate the average S.F bond energy in SF_(6). The standard heat of formation values of SF_(6)(g),S(g) and F(g) are -1100, 275 and 80 kJ "mol"^(-1) respectively. (ii) The heat liberated on complete combustion of 7.8 g benzene is 327 kJ. This heat has been measured at constant volume and at 27^(@) C. Calculate heat of combustion of benzene at constant pressure at 27^(@) C, (R = 8.3 J"mol"^(-1) K^(-1))
Answer» SOLUTION :(i) `309.17` (II) `-3273.735` KJ