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DeltaH(f)^(@) for Al(2)O(3) is -1670kJ. ...

`DeltaH_(f)^(@)` for `Al_(2)O_(3)` is `-1670kJ`. Calculate the enthalpy change for the reaction`:4Al+3O_(2) rarr 2Al_(2)O_(3)`.

Text Solution

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Given`:2Al+(3//2)O_(2) rarr Al_(2)O_(3),DeltaH=-1670kJ` multiplying it by 2,
`4Al+3O_(2) rarr 2Al_(2)O_(3),`
`DeltaH=2xx(-1670)=-3340kJ`
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