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The entropy change of orgon is given to ...

The entropy change of orgon is given to a good approximation by the expression :
`S_(m)//JK^(-1)mol^(-1)=36+20lnT//K`
Calculate the change in Gibbs free energy of one mole of argon gas when it is heated from `300` K to `400` K at constant pressure. Express your answer excluding sing and decimal places.

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