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Which of the following thermodynamic rel...

Which of the following thermodynamic relation is correct?

A

`dG=VdP-SdT`

B

`dH=VdP-SdT`

C

`dH = -VdP + TdS`

D

`dG=VdP + SdT`

Text Solution

Verified by Experts

The correct Answer is:
A
`dG = dH - TdS - SdT " " (G = H - TS)`
`dH = dU + PdV + VdP " " (H =U + PV)`
and `dU = TdS - PdV`
`therefore d G = (TdS - PdV) + PdV + VdP - TdS - SdT`
`dG = VdP - SdT`
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