When 4 g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalpy of formation of ferric oxide (At. Wt. of Fe = 56) [AIIMS 1999]

When 4 g of iron is burnt to ferric oxide at constant pressure, 29.28

1.	When 4 g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalpy of formation of ferric oxide (At. Wt. of Fe = 56) [AIIMS 1999]
A.	? 81.98 kJ
B.	? 819.8 kJ
C.	? 40.99 kJ
D.	+ 819.8 kJ
Answer» C. ? 40.99 kJ

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When 4 g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalpy of formation of ferric oxide (At. Wt. of Fe = 56) [AIIMS 1999]

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