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At 1000 K water vapour at 1 atm has been...

At 1000 K water vapour at 1 atm has been found to be dissociated into `H_(2)` and `O_(2)` to the extent of `3 xx 10^(-5)%`. Calculate the free energy decrease of the system, assuming ideal behavior.

A

`Delta G = 90929` cal

B

`-Delta G = 20` cal

C

`-Delta G = 480` cal

D

`-Delta G = -45760` cal

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