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Considering the following reactions, ...

Considering the following reactions,
`C+(1//2)O_2 rarr CO, Delta H =- 26.4 kcal `
`H_2 + (1//2) O_2 rarr H_2O_((l)) , Delta H =-57.8 kcal `
`Delta H` for the reaction.
`H_2O+ C rarr H_2 + CO` is

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