# GATE MT 2015 Q21. Select the CORRECT plot of Gibbs free energy (G) vs temperature (T) of a single component system from the following:

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Askmemetallurgy Official

Asked: 2020-04-01T04:20:50+05:30
2020-04-01T04:20:50+05:30In: Thermodynamics & Rate Processes

16.67%(A) P ( 2 voters )
66.67%(B) Q ( 8 voters )
0%(C) R
16.67%(D) S ( 2 voters )

Based On 12 Votes

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Correct answer is option B. As we know that, from Gibbs free energy : G=H-TS ∂G/ ∂T= -S It can be seen from the above relation that, as temperature increases, entropy increases thus, implementing that as temperature increases,slope of the curve decreases. This condition is satisfied by Curve Q.

Correct answer is option B.

As we know that, from Gibbs free energy : G=H-TS

∂G/ ∂T= -S

It can be seen from the above relation that, as temperature increases, entropy increases thus, implementing that as temperature increases,slope of the curve decreases. This condition is satisfied by Curve Q.

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