question_answer

If  \[S+{{O}_{2}}\to S{{O}_{2}};\,(\Delta H=-298.2)\]                 \[S{{O}_{2}}+\frac{1}{2}{{O}_{2}}\to S{{O}_{3}};\,(\Delta H=-98.2)\]                 \[S{{O}_{3}}+{{H}_{2}}O\to {{H}_{2}}S{{O}_{4}};\,(\Delta H=-130.2)\]                 \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\to {{H}_{2}}O;\,(\Delta H=-287.3)\]                 then the enthalpy of formation of \[{{H}_{2}}S{{O}_{4}}\] at 298K will be [DPMT 1983; Orissa JEE 2005]

A)                 \[-433.7\,kJ\]    

B)                 \[-650.3\,kJ\]

C)                 \[+320.5\,kJ\]   

D)                 \[-813.9\,kJ\]