Study the following thermochemical data:

The enthalpy of formation of at 298 K will be

Question

Study the following thermochemical data:
$ ext{S} + ext{O}_2 o ext{SO}_2; \Delta H = -298.2 ext{ kJ}$
$ ext{SO}_2 + 1/2 ext{O}_2 o ext{SO}_3; \Delta H = -98.2 ext{ kJ}$
$ ext{SO}_3 + ext{H}_2 ext{O} o ext{H}_2 ext{SO}_4; \Delta H = -130.2 ext{ kJ}$
$ ext{H}_2 + 1/2 ext{O}_2 o ext{H}_2 ext{O}; \Delta H = -287.3 ext{ kJ}$
The enthalpy of formation of $ ext{H}_2 ext{SO}_4$ at 298 K will be

Prashant Kotian · Accepted Answer

Correct answer: D. Enthalpy of formation maps to the direct combination from elements: . This can be achieved by simply adding all four given equations: .

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