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Given: C(s)+O(2)(g)toCO(2)(g),DeltaH=-39...

Given: `C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393.5kJ`
`2H_(2)(g)+O_(2)(g)to2H_(2)O(g),DeltaH=-571.6kJ`
Calculate `DeltaH` of the reaction:
`C(s)+2H_(2)O(g)toCO_(2)(g)+2H_(2)(g)`.

Text Solution

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`C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393.5kJ` . . [1]
`2H_(2)(g)+O_(2)(g)to2H_(2)O(g),DeltaH=-571.6kJ` . . .[2]
Subtracting equation [2] from equation [1], we have
`C(s)+2H_(2)O(g)toCO_(2)(g)+2H_(2)(g),`
`DeltaH=[-393.5-(-571.6)]kJ=178.1kJ`
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