Calculate `DeltaH^(@)` for the reaction :
`Na_(2) O + SO_(3) to Na_(2) SO_(4)` given the following :
A) `Na_((s)) + underset((1))(H_(2)O) to NaOH_((s)) + (1)/(2) H_(2 (g)) , Delta H^(@) = -146kJ`
B) `Na_(2) SO_(4 (s)) + underset((1))(H_(2)O) to 2 NaOH_((s)) + SO_(3 (g)) , Delta H^(@) = +418 kJ`
C) `2 Na_(2) O_((s)) + 2 H_(2 (g)) to 4 Na_((s)) + 2 H_(2) O_((l)) , DeltaH^(@) = +259` kJ

Options

A. `+823` KJ
B. `-580.5` KJ
C. `-435 KJ`
D. `+531 KJ`

Answer

B