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Calculate the standard internal energy c...

Calculate the standard internal energy change for the following reactions at `25^(@)C`:
`2H_(2)O_(2)(l) rarr 2H_(2)O(l) +O_(2)(g)`
`Delta_(f)H^(Theta) at 25^(@)C` for `H_(2)O_(2)(l) =- 188 kJ mol^(-1) H_(2)O(l) =- 286 kJ mol^(-1)`

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To calculate the standard internal energy change (ΔU) for the reaction: \[ 2H_2O_2(l) \rightarrow 2H_2O(l) + O_2(g) \] at 25°C, we will use the relationship between enthalpy change (ΔH) and internal energy change (ΔU): \[ \Delta H = \Delta U + \Delta N_g RT \] ...
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