The standared enthalpies of formation at `298K` for `C C1(g), H_(2)O(g), CO_(2)(g)` and `HC1(g)` are `-106.7, -241.8, -393.7`, and `-92.5kJ mol^(-1)`, respectively. Calculate `DeltaH^(Theta)underset(298K)` for the reaction
`C C1_(4)(g) +2H_(2)O(g) rarr CO_(2)(g) +4HCI_(g)`

Explanation

To calculate the standard enthalpy change (ΔH°) for the reaction:

\[ \text{CCl}_4(g) + 2\text{H}_2\text{O}(g) \rightarrow \text{CO}_2(g) + 4\text{HCl}(g) \]

we will use the standard enthalpy of formation values provided for each substance involved in the reaction.

### Step 1: Write down the standard enthalpy of formation values

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