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The standard heats of formation at 298 K...

The standard heats of formation at 298 K for `C``CI_4(g)`,`H_2O` (g), `CO_2 `(g)` and HCI (g) are -25.5, -57.8, -94.1 and -22.1 kcal mol^-1` respectively,calculate `DeltaH "_(298K)^@`, for the reaction :
`C``Cl_4` (g) + `2H_2O` (g) to `CO_2 (g)` + `4HCI (g)`

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