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Calculate the pressure of CO(2) gas at 7...

Calculate the pressure of `CO_(2)` gas at `700 K` in the heterogenous equilibrium reaction `CaCO_(3)(s) hArr CaO(s)+CO_(2)(g),` if `DeltaG^(ɵ)` for this reaction is `130.2 kJ mol^(-1)`.

Text Solution

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`DeltaG^@=-2.303 RT log K_p`
`therefore log K_p=-(DeltaG^@)/(2.303 xxRxxT)`
`=- (130.2 xx 10^3J mol^(-1))/((8.314 JK^(-1)mol^(-1))xx(700K)xx2.303)`
`therefore K_p=1.94 xx10^(-10)atm=P_(CO_2)`
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