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When 4g of iron is burnt to ferric oxide...

When `4g` of iron is burnt to ferric oxide at constant pressure, `29.28KJ` of heat is evolved. What is the enthalpy of formation of ferric oxide (At wt. of `Fe=56`)

A

`819.84 kJ`

B

`40.99 kJ`

C

`81.98kJ`

D

`409.0kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`2Fe +(3)/(2)O_(2) rarr Fe_(2)O_(3)`
4g of `Fe rarr 29.28 KJ` of Heat 56g of `Fe rarr?`
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