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If we measure DeltaH^(theta) and DeltaS^...

If we measure `DeltaH^(theta) and DeltaS^(theta)` it is possible to estimate `DeltaG^(theta)`. Is it true? Why?

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Gibbs Helmholtz equation is `DeltaG^(theta)=DeltaH^(theta)-TDeltaS^(theta)` Standard values of `DeltaH^(theta), DeltaS^(theta)` are measured at standard temperature 298 K. So, if we measured `DeltaH^(theta) and DeltaS^(theta)` it is possible to estimate `DeltaG^(theta)` according to the above relation.
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