The standard heat of formation values of `SF_(6)(g), S(g)`, and `F(g)` are `-1100, 275`, and `80 kJ mol^(-1)`, respectively. Then the average `S-F` bond enegry in `SF_(6)`

Estimate the average S-F bond enthalpy in SF_(6) . The values of standard enthalpy of formation of SF_(6)(g),S(g) and F(g) are :- 1100, 274 and 80 kJ mol^(-1) respectively.

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.

The standard heat of formation of NO_(2)(g) and N_(2)O_(4)(g) are 8.0 and 4.0 kcal mol ^(-1) respectively. The heat of dimerisation of NO_(2) in kcal is

The standard heats of formation of CH_(4)(g), CO_(2)(g) and H_(2)O(g) are -76.0, -390.0 , and -240.0 kJ mol^(-1) , respectively. Calculate the amount of heat evolved by burning 1m^(3) of methane measured under normal conditions.

The standard heats of formation of NO_(2)(g) and N_(2)O_(4)(g) are 8.0 and 2.0 Kcal mol^(-1) respectively the heat of dimerization of NO_(2) in Kcal is

The heat of combustion of CH_(4)(g), C_(2)H_(6)(g) and H_(2)(g) are -890.3, -1559,7 and -285.9 kJ mol^(-1) , respectively. Which of these fuels is most efficient?

The heat of atomisation of PH_(3)(g) and P_(2)H_(4)(g) are 954 kJ mol^(-1) and 1485 kJ mol^(-1) respectively. The P-P bond energy in kJ mol^(-1) is

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The heat of formations for CO_(2)(g),H_(2)O(l) and CH_(4)(g) are -400 kJ mol^(-1),-280" kJ "mol^(-1) and -70" kJ "mol^(-1) , respectively. The heat of combustion of CH_(4) in kJ mol^(-1) is

Calculate the standard free energy change for the reaction 4NH_3(g) + 5O_2(g) to 4NO(g) + 6H_2O(l) Given that the standard free energy of formation (Delta_f G^@)" for " NH_3(g) NO(g) and H_2O (l) are -16.8, + 86.7 and -237.2 kJ mol^(-1) respectively. Predict the feasibility of the above reaction at the standard state.