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If 2AI(s) +1(1)/(2) O(2)(g) rarr AI(2)O(...

If `2AI(s) +1(1)/(2) O_(2)(g) rarr AI_(2)O_(3)(s), DeltaH =- 1667.8 kJ`
`H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.9 kJ`
Calculate `DeltaH` for the reaction
`AI_(2)O_(3)(s) rarr 2AI(s) +1(1)/(2)O_(2)(g)`

Text Solution

Verified by Experts

To calculate `DeltaH` of the reaction.
`AI_(2)O_(3)(s) rarr 2AI(s) +1(1)/(2)O_(2)(g), DeltaH = ?`
`DeltaH = - DeltaH_(1)`
`= (-166.78) = 166.78 kJ mol^(-1)`
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