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Delta G^(@) at 500 K for substance 'S' ...

`Delta G^(@)` at 500 K for substance 'S' in liquid state and gaseous state are +100.7 kcal `mol^(-1)` and +103 kcal `mol^(-1)` respectively vapour pressure of liquid 'S' at 500 K is approximately equal to :
`(R=2 cal K^(-1) mol^(01))`

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