Question

Calculate the standard enthalpy of formation of `SO_(3)` at 298 K using the following reactions and enthalpies
`S_(8) (s) + 8 O_(2) (g) rarr 8SO_(2)(g) , DeltaH^(@) = - 2775kJ mol^(-1)`
`2SO_(2) (g) + O_(2)(g) rarr 2SO_(3)(g), DeltaH^(@) = - 198 kJ mol^(-1)`

Answer 1

Correct Answer - `-445.9 kJ mol^(-1)`
Aim `: (1)/(8) S_(8)(s) + (3)/(2) (g) rarr SO_(3) ,DeltaH = ?`