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Calculated the equilibrium constant for the following reaction at `298K`:
`2H_(2)O(l) rarr 2H_(2)(g) +O_(2)(g)`
`Delta_(f)G^(Theta) (H_(2)O) =- 237.2 kJ mol^(-1),R = 8.314 J mol^(-1) K^(-1)`

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`DeltaG^(Theta) = [2Delta_(f)G^(Theta)(H_(2))+Delta_(f)G^(Theta)(O_(2))] -[2Delta_(f)G^(Theta) (H_(2)O)]`
` =-2 xx (-237.2) = 474.4 kJ`
`log K =- (474400)/(2.303 xx 8.314 xx 298), K = 7.19 xx 10^(-84)`
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