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Calculate Delta(f)H^(@) for chloride ion...

Calculate `Delta_(f)H^(@)` for chloride ion from the following data:
`1/2H_(2)(g) + 1/2CI_(2)(g) to HCI(g)`
`Delta_(f)H^(@) = -92.8 kJ mol^(-1)`
`HCI(g) + H_(2)O to H_(3)O^(+)(aq) + CI^(-)(aq)`
`Delta_(diss) H^(@) = - 75.2 kJ mol^(-1)`.

Text Solution

AI Generated Solution

To calculate the heat of formation (Δ_fH^(@)) for the chloride ion (Cl^-), we will use the provided thermodynamic data and apply Hess's law. Here are the steps to solve the problem: ### Step 1: Write down the given reactions and their enthalpy changes. 1. Reaction 1: \[ \frac{1}{2} H_2(g) + \frac{1}{2} Cl_2(g) \rightarrow HCl(g) \quad \Delta_fH^(@) = -92.8 \, \text{kJ/mol} \] ...
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